I did these as warmups last night, even though they were the last things I did before bed.
(I don't know why the scan is so cropped. I'll get a better one later today, but, for now, I kinda like the oddly trimmed version.)
I timed myself and tried to spend just 20 minutes on each of them, but usually did some touching up after that 20 minutes was up. Also, I didn't do any pencil sketches, just went straight to ink and watercolor, trying out new techniques and trying to push my style some.
The pinup chick is the exception to both of those guidelines. I did a little penciling for the basic anatomy, and spent probably 40 minutes on her from start to finish.
What do you think, should I stick with them?