MY girlfriend and I love it, although saving for a house mean we haven't been able to go for a couple of years.
Staying in a Disney hotel lets you breakfast in 'Fantasyland' in the park before it open to Joe Public, letting you tick off most of the smaller rides early. Truth be told, Peter Pan and Dumbo get massive queues through the day and aren't really worth it.
Not to be too nerdy, but the art and little things you don't notice are amazing. If you're interested in design do a little desk research before you go.
For example, although a dull ride, It's a Small World was largely designed by Mary Blair who's a very highly regarded designer/illustrator.
If you walk past Phantom Manor to Boot Hill, there's a graveyard with witty gravestones which is worth 5 mins.
The original audio welcoming you to the Phantom Manor was recorded by Vincent Price, but they don't use it anymore as patrons are mainly Non-English, so they use a French voice-over instead.