Okay. *cracks knuckles*
I'm relatively new to the whole credit card churning/point chasing/travel hacking thing, so keep that in mind. There are a lot of people here with more experience than me.
I have opened 5 new credit cards this year, all with the specific goal of saving on our upcoming Disney trip in December. Prior to this little venture, I had one card, a Chase Freedom. I still have it, and it's a great card.
Anyway, since September I have obtained:
1. Disney Rewards Visa (no annual fee...got a referral and got the $200 Disney Gift Card sign-up bonus)
2. Southwest Premier Visa ($98 annual fee...got 50,000 Rapid Rewards Points sign-up bonus...closed this one recently)
3. Sam's Club Mastercard (no annual fee...I only got it because I was pre-approved for it when I joined Sam's. I never use it)
4. Chase Freedom Unlimited (no annual fee...got $150 sign-up bonus and $50 from sharing a referral link on FB)
5. Chase Sapphire Preferred ($95 annual fee - waived for first year...got 50,000 Ultimate Rewards sign-up bonus)
Of these cards, the Freedom I originally had, the Freedom Unlimited, and the Sapphire Preferred all stay in my purse. I can combine my Ultimate Rewards points between them and either use them for travel via the Sapphire card, or get cash back. I closed the Southwest card because the Sapphire is all the travel card I need, and I don't want two cards with annual fees.
Basically, the Southwest card should (depending on rates when they come out for December) pay for our three round-trip tickets to/from Orlando.
The 50,000 points on the Sapphire Preferred will be cashed in for $500 (I know this isn't the best "bang for my buck", but right now cash is king. So that $500 + $200 from Unlimited + $200 Disney gift card = $900 towards $1150 worth of park tickets. I earn around $20/month via Ultimate Rewards on the Freedom, Unlimited, and Sapphire combined...and have probably already gotten around $100 just from normal cash back since September. I should be able to put away another $1-200 just from normal spending and cash back by the time the trip rolls around, so that should more than pay for our tickets. Tickets which, by the way, were bought via discounted Disney gift cards from Sam's that I earned 5% cash back on because I purchased them with my Chase Freedom card during a quarter when wholesale clubs were in the bonus category.
Long story short...look at sign-up bonuses AND whether or not the card will be one you'll use enough to earn a substantial amount of rewards. If you want to pay for flights, look into a travel card or an airline specific card. Find one with a generous sign-up bonus and use it for your everyday spending to meet the required spend. If you're more interested in cash back, look for no-fee cards with high cash back rates.
The Disney Visa is good to keep around for using in the parks themselves, as you can get 10% discounts on some shopping and dining, plus the exclusive character meets. It doesn't appeal to me outside of that (and the sign-up bonus I got) though because it only earns 1%, and that's only good towards Disney stuff. I'd rather have 1.5-5% back in cash that I can decide to put towards Disney if I want.