If you go expecting DL to be WDW and you feel WDW is the end all be all you may be disappointed. They are different in many ways.
Don't plan too much. Not only is it unnecessary but the last thing DL needs is the over planning mentality to effect the laid visits it offers. If you are planner by nature work on planning your next WDW visit and go to DL knowing you will not miss a thing if you don't have every second of every day planned from attractions to meals and everything in-between.
Don't stay in a motel off site if you are use to and want the Disney bubble. I have heard way too many WDW people visit DL and complain there is no Disney bubble, when they stayed off site. Yes, some still feel the Disney emersion when they stay off site but there is a difference IMHO. If you stay off site be prepared to not feel as if you are in the Disney bubble, but know the bubble does exist! Oh and if you happen to see a street or building when you are high up on an attraction stop looking at it and enjoy what you are doing, rather than looking for a reason to dislike DL for not being miles from civilization.
Embrace the differences.
Enjoy park hopping within in a few minutes. Enjoy no buses or cars or any other need for transportation from your hotel to the parks.
Don't look at the more compact DL as having too narrow walkways but rather enjoy the close proximity of all the attractions.
Don't be disappointed with the fewer sit down restaurants. The ones DL have are fabulous and their counter service offerings are superior to WDW. And you don't have to decide where you want to eat 4 months out or well before you have any idea what you may want to eat on a given day.
Enjoy FP knowing you can pick what you want to do when you want to do it as opposed to FP+ where you have to decide what you are going to do even if you don't feel like it at that moment.
Don't compare your CM interaction to those that you have at WDW. It is a very different interaction a seasoned park goer has with CM as opposed to a newbee. We had miserable CM experiences each time we have gone to WDW and wonderful CM interactions at DL. Probably because at DL all of our interactions are social and at WDW they are more of a question or direction nature.
DL has a different culture than WDW. Characters can still roam DL without "handlers". They can do this at DL because people are much more laid back. This is partially do the large number of locals that make up the customer base at DL.
Lastly don't walk down Main Street looking at the castle and think, "oh it is so small" but think about how Walt himself walked those same steps and viewed that same castle and knew how majestic it was.
dsny1mom