Here is what we did:
Saw Mystere at Treasure Island (Liked it, kind of weird) MGM Grand Adventures-not many rides had fun getting people wet. Rode the roller coaster at NY NY (Loved it!) Treasure Island pirate fight/Volcano-one of those must see things. Saw the Animals at Siegried and Roy-tigars, cougars, seals, elephant etc. Took a trolly to the Hilton and ate at Benny Hannah's.
We had a great time. Vegas is so exciting and romantic. I am planning a trip there now. We didn't get to see everything the first time and there are things that we didn't even know about. Make sure if your going to vegas that you go with someone you can have a blast with. Also when picking a hotel the big casino's arent always the best. Bally's wasn't overcroweded and we had an awesome view of the MGM and NY NY end of the strip. Some of the other casinos charge so much more than we paid and you don't even get a view.