Cancun is a wonderful thirteen mile stretch (less than one mile wide) of beautiful Caribbean beaches and resorts! There is a wonderful downtown area with lots of places to buy Mexican stuff!
Favourite spots:
Definately the downtown area and the clubs. There are some amazing resorts... I have only been to two of them so far... but I plan on going back!
What's really great:
The booze cruise ;) and the bar-hopping tour.. (what else?!?!)
Accommodations:
I stayed at the Hyatt Regency (not the Caribe) and Carribean Village (Allegro). I would reccomend Carribean Village over Hyatt...although Hyatt is a bit more ritzy...Carribean Village is a non-stop party!!!