I'll give my opinion on the ones that I have experience with.
Cirque is definitely worth it to me! It took two years for me to decide to take the plunge and pay the ticket price, but once I did it, I wondered why I waited so long (I know why I waited - the tickets are so expensive LOL!). It is an awesome show and, to us, worth every penny.
Hoop Dee Doo - I'm in the minority here, but we didn't care for it. We did this several years ago and got stuck in the seating area upstairs. I spent the evening trying to see the show around a big pole and just felt like I was 'on the outside looking in' at everyone downstairs having a great time. I'll never repeat this. It definitely was NOT worth the money to us. The food wasn't very good and if you get stuck upstairs it makes things even worse!
Have never tried DQ
Character Meals - this is kind of tough to answer. We love Cindy's Royal Table, despite the fact that my DD is well past the age of wanting character autographs (although she'll still hop up to a character for a photo op!!). I think it depends on if you have kids and what their ages are. (Or, if you're a kid at heart!!!) If they're young, the character meals are great! We still go to Cindy's because we love the food and the atmosphere. That's about the only character meal we do anymore.
Keys to the Kingdom - I wish I could respond here; I'd love to try it too, but my DD is too young. One part of me can't wait til she's old enough to go on this tour - the other part of me wants to stop her from growing up so fast!!
Hope this helps you make a decision! Have fun!
'75 offsite,76 offsite,
'88
Disneyland
'93 CBR, 94 Poly,95 ASM
'96 GF,'97 PO, '98 DxL
Summer '99 BC & WL
Winter '99 Contempo
Summer '00 BW/Poly
Winter '00 OKW
Summer '01
Disney Cruise & BWV