If you were to fund a project with kickstarter, it should be something special. You should go all the way and make a true, worthy spiritual successor to Planescape Torment. Isometricy, turn-basedy goodness. The kind of RPG your grandfather used to play, not a glorified action game. I realise this genre is long dead, and it's not the type of thing you go after if you're out to make money, but, well, I hope that you'd be surprised and at the very least could give classic RPGs one last hurrah.
It of course wouldn't need to be Planescape Torment 2; the original wrapped things up quite nicely. Just that style of game with the great writing, atmosphere and characters. The only thing I'd like to be different is the combat which was fairly mediocre - I'd like challenging, tactical, turn-based combat, like in Fallout 1 and 2, but better than that (it had a number of issues and often devolved into mindlessly eye-shotting things until they fell over). Still, you get the idea.
Personally, my dream RPG is set in a space-western universe like Firefly or Cowboy Bebop. Similar to such shows, you are a member of a rag-tag group of rebels, mercenaries or outlaws who do what they need to do to survive out in the black, travelling from planet to planet, meeting new and interesting people, discovering each planet's culture, history, and the problems its inhabitants face, then leaving before things get stale. I think a universe like that would be amazing for a creative mind like yours to work with.
The two most important things for me are writing and quest design. I love well written games and I love choices and consequences - such a game would have tons of ways to complete quests, with choices that actually matter and can effect the game and may even come back to bite you in the ass.
But really, you're a legend. I'm sure you have ideas that are far superior to anything I could come up with. I'd love for you to have complete and utter freedom for once, not bound by any publisher. I, for one, will happily donate to such a game.
Thanks for reading.