I like half-doublewidth res better -- that is, like 320x480/400 ModeX rather than 160x200. Sadly it's super annoying to draw for me (in spite of the only obvious difference being doubled DPI.)
Honestly I think a lot of the doublewidth-pixel appeal comes from the same cute/exaggerated look found in 'chibis', which you definitely have there. I find if I start looking for (or trying to make) really discrete 'detail' in doublewidth works, I just get pissed off.
Also that flower really reminds me of Rodland, heh.
On a totally different subject,
highly customizable 'drawing'-style 3d render engine for Blender. Looks like this could be pretty amazing, I'm looking forward to messing around with that once I get the time.