I kind of disagree with the general consensus above (other than C&B Young!), if only because I took a different route and that's what I know. It is definitely common today to tell people to get the top, the best, the complex...and then learn how to use it. But yesterday, often folks would start with the basic, then work to the middle, then earn the top through experience, learning, and hard work. So I know I'm a yesterday-type guy in a today world, where everyone has to be brimming with the absolute latest-and-greatest and best of everything right from day one. I accept that - It's my fault, so take everything I say as just my old-fashioned fogie opinion!
I honestly believe that half of all people buying DSLRs today shouldn't have...I really think they'd be better served with a cheaper, smaller, more versatile package that is sort of like an Air Force trainer jet...it can perform very well, but is simplified and streamlined, and becomes an excellent tool by which one can learn the basics, and start to understand the controls, before moving up to the multi-billion dollar super fighter jet. Sure...I know DSLRs can be cheap, and sure, there are entry level models...and yes, they all can shoot in auto mode too. But I just guess I'm old fashioned enough in my mindset to feel like a DSLR should be something to aspire to after you've already determined you are wanting to pursue photography as more than just vacation snapshots.
The problem is...DSLRs are larger, heavier, and more expensive. Even the used body, or cheaper entry level body, is already at or above the price of a decent high end P&S ultrazoom or prosumer. And you haven't even added lenses. Maybe you get the kit lens, and get to learn what photography is like between 17-80mm, and starting at F3.5. Until you can afford more lenses. And while learning...especially coming from being a complete novice who just really wanted a good camera for basic needs but got tallked into a DSLR because it's what you simply MUST HAVE...you have to lug around this massive hunk of plastic and metal...which can take away some of the spontaneity and fun of photography. Whereas for under $450, they probably could have had a tiny, lightweight, convenient superzoom that can shoot from 27mm to 560mm, from F2.8, and still have manual controls enough to go through the learning process and begin to understand the effects of shutter, aperture, and ISO changes on their photos...and when to make those changes. The simple live-view systems of P&S allows the newbie to physically see changes taking place in real time, just like video, on the LCD screen as they adjust white balance, or select spot meter and move it around the scene at light and dark subjects watching the camera adjust the settings and drastically change the image. One can grow so much in photography with just a cheap, simple tool like this - even grow themselves to the point where they can produce sale-worthy photos, get hired for jobs, and be published in national magazines...and have the versatility of a 2 or 3 lens collection in a palm-sized package.
Are there shortcomings? Of course - the DSLR has to be better at some things - that's what makes it worth aspiring to! The best part is the journey...learning and growing and getting better, until you finally reach the big reward and truly find yourself so skilled and capable that you've hit the limitations of that camera and can then decide how much you like photography. If you're not overly passionate about it, but just enjoy being able to shoot well when needed on vacations and at events, maybe you'll just stay with what you've got...or upgrade to a cheap basic DSLR to gain some low light capability. If you find yourself very passionate about it, then move up to a good DSLR and start the lens lust - finding the specialty lenses that let you express yourself and pursue the photographic style you enjoy.
Hey...just one man's opinion. I'm quite sure there are dozens of photographers out there who are so amazing they're going to change the world with their brilliance and bring about world peace, who bought a DSLR first with no skill and learned on it. What do I know? I'm just being honest about my feelings on the subject.
I am very happy I bought a good prosumer camera in 2003, that was the very first camera that truly taught me photography. I learned all that I know today about metering, composition, depth, aperture, shutter, ISO, white balance, and more from that prosumer camera. This despite the fact that I have had SLRs since 1977. I just never really knew how to use them - I pointed, made the meter go to the middle, focused best I could, and snapped.
I then moved from that prosumer to an ultrazoom...and this took my skills learned with the previous camera, and expanded upon them...teaching me how to change and adjust the settings throughout the huge lens range - and begin to understand the technique required for everything from macro and wide to super-telephoto. With that ultrazoom, I actually did several hired shoots, sold photos, and got published 3 times, twice nationally - this type of camera can take you so far it's unbelievable. Only after nearly 6 years of learning, growing, and pushing to the very limits of what I could do with those cameras, did I decide the DSLR was where I should go next. I was ready - I know I loved photography, I was ready to make sacrifices for my newfound passion, I was ready to dedicate an entire walk-in closet to only camera gear, spend thousands of dollars for new lenses and bodies every year. I honestly felt like I worked for it and earned it...and was happy I did. And I particularly enjoyed shooting with it the very first week, and giving field lessons to some DSLR shooters who hadn't really learned much and were struggling to get good shots from their shiny new toys...this despite being brand new to DSLRs myself.
Anyway...that's my old fogie opinion that will likely prove extremely unpopular here, likely a lonely opinion with few supporters!
