well I've started working on something different a couple weeks ago, it's a Myst-like-Yume-Nikki-like-Easter-Minds-like... the game is a pre-rendered, mid 90s style explore-em-up. im able to make 3d content in the early-cg style surprisingly fast.
argh I know I haven't finished anything in awhile but im going to keep development time short on this- 5 months.
im planning on having 5 big worlds(30+ screens) and lots of smaller worlds and this is one of them, and the modeling is done in about 3 days(just need to render the 130+ stills and program the rooms!) so I think if I can do this in about 4 days then the other areas are pretty doable in a 5 month period.
this will be my first commercial project too. im sick of working regular jobs, and if I could make enough money to work to take a leave for like 6 months to work on games full time...