Well, I just hope that if you plan on doing another kind of games, apart from roguelikes, you still work them (at least in your existing ones) from time to time. Preferably, I'd like that you DON'T leave the roguelikes at all :P. I know you said you won't leave them totally, but as other projects start spawning you might get so involved in them that you forget about these others. In my opinion, that would be a sad thing.
For me, I'd also love to see more steps on the DoomRL saga, although I think it might never be "completed" in some sense, as room for improvement always exists in this world, and more so in a roguelike. I really hope that you never let it die, since it has brought me very nice times. At least, if you plan on leaving it completely, release the source so someone can continue your work on it.
The Stardreamer, as nokturnal said, sounds really interesting indeed, although I have never had the oportunity to play Elite, I've played similar games (I think) and in my opinion something nice can come of it. Also you show very original ideas, and I suppose all your other games will be a good bunch too.
So, as a conclusion... If you like to do some other things because you think they'll make you happier, then by all means do so. It's just that I fear for my poor RLs, they will be so lonely...
Happy new year to you all!
May your dreams come true on 2007.
