Anything, especially nightshots, landscapes, macros, still life, etc. Though I feel for serious portraits and streetshoots, prosumers lose out in terms of speed, lens, flash and ISO. But G9 is a great cam, I remember I had a G1 when I was a little kid... 7-8yrs back these were my first few pics fr a newb me sample1 sample2
Dug it out recently, still usable... sample3
Just remember, "if it's worth taking a whole shot of, it's worth taking a whole roll of film of it" meaning to say, if there's something interesting / nice, take a lot of pics of it. Digital captures are now determined by your memory space, so if you have the space, make use of it! Singapore buildings are being cleared and replace so often nowadays, a nice looking modern building might not be there next year.
EDIT: I too would like a G9 or G10 (rumors of it, but definitely at a higher price I'd presume) so that I don't have to lug around my dslr the whole day yet still be able to get decent captures. It has 1/500 flash sync speed, great for my strobist work =)
Oh, and to the thread starter, if you're out of ideas for a shot, check out photos from www.flickr.com for inspiration =)