Of the motorcycles I have rode, the Honda(F4i) was the most stable and never gave me any suprises. Sometimes when I'm at a pretty good lean, I'll go over some bumps and the bike still wants to stay on track.

Bikes I have rode: '03 R1, '00? R6, 00 gsxr600, '?? 929, '00 GS500(loved this one too, I could ride it for hours; AND this was my first bike)