Places we've been in the US other than WDW are:
San Francisco - really nice, Alcatraz was really good. There are so many other places to visit that are close as well.
Yosemite - Wonderful, we only had 2 days there and we saw hardly anything. It is an amazing place and so peaceful, I definitely want to go back there.
LA - It was nice to go and see the original Disney. There are some nice places near LA, but we were really disappointed with Hollywood and the Walk of Stars etc, it as really run down and a bit seedy Santa Monica was nice.
Vegas - Well you either love it or hate it :D I'm glad we went, but I can't see us ever going back again, only if we wanted to go back to the Grand Canyon which was FANTASTIC!!!! We did a helicopter tour over the Canyon and then landed inside and had a trip up the river for breakfast. It really was wonderful, I'd do it again in a heartbeat. We also saw the Hoover Dam which was amazing.
Hawaii (Oahu) - My dream holiday (other than WDW of course just don't make me choose :o ) Everybody should be able to go to one of the island in their lifetime. It is expensive but there us so much to do you have everything to keep everyone happy, beaches, things to do, sight seeing, history.
In the UK we've been to:
The Lake District which was really nice and we would go back, perfect if you like walking or taking photos, as DH does :D
Poole/Bournemouth - we have been there so many times, we have friends there it is a lovely place - I particularly fond of Sandbanks - if only I could afford to love there that will never ever happen though
Cornwall is OK people rave about it, but I lived in Cornwall for 15 years and so I don't see anything nice about it, it's changed too much for me I remember the way it used to be :o
Devon - there are some lovely places in Devon :D
Other than that, I've been to Greece, Spain, Cyprus, Majorca and Tenerife - they are all beach holidays and DH is not the type of person who likes to lie on the beach They are all very much the same as well.
I would love to go to Ireland and now with flights available from our local airport we are likely to go sooner rather than later :D