Well, personally, I love a new type of map. Speed ball is terific! i've tried it out, and its so original. Really, though, you cant go wrong with the following:
cinematics
escape games
campaigns
mini games
games in an underground setting with LOTS of rock chunks
The above are usually quite diferent from eachother. Thats why, I myself, am making an escape game - Escape London - (but at moment, finding it hard to submit to wc3anvil).
I absoloutly cant resist trying out a new campaign, so much fun, and so much to do! But also, I love to play NEW escapes, because they are all diferent, every single escape game, is usually unique, so escape games are my favourite.