Like nekoXrebellion, I also want to make a Yume Nikki fan game... It's been a dream of mine for about a year or two learning how to make pixel art, particularly as I played Castlevania Symphony of the Night.. the art in that is so beautifu! Well-made pixel art is one of my favorite things of an RPGmaker game, the other things being a trippy/scary atmosphere, great ambient music, and that afterwards there is just enough to piece together a theory about what happened in the game. My favorite RPGmaker games then are mostly Yume Nikki fan games, .flow, Yume 2kki, and I also liked The Witch's House a lot.
I also want to learn about more RPGmaker games, so I'll be keeping a close eye on this thread.