Large and luxurious are the keywords for Bellagio. We stayed in a L&L room with a great view of the fountains and a spacious bathroom...that's always good because, ya know, I always like to have plenty of room when doing my thing in the morning. When you're blurry-eyed from a late night at the tables, you don't want to worry about your toothbrush falling in the toilet. Oh, and the bed was one of the most comfortable I've encountered in a hotel.
L&L also applies to their buffet. I am not a huge buffet fan, but their brunch buffet has a huge variety of high-quality choices. If you're trying to eat healthy, there are plenty of delicious choices that won't pack on the pounds.
The pool area is very pretty but of course gets crowded on a sunny day. Try getting there before 11am. The pool bar has some great drinks if you don't mind paying the prices (I had the frozen mango belini, my friend had watermelon juice - both delicious!). If you need a cab, skip the monstrous taxi line in front of the hotel and instead go to the little north entrance where you might only have to wait a minute or two for a cab.
As one would expect, the casino tends to be higher limit tables. You'll find only a very small number of $10 on a weekend night, and NEVER any $5 tables. The dealers are friendly and make the games fun.