I love this bike, it morphed form a 2002 stumpy I had, which was gradually upgraded and eventually I replaced the frame. The rear mech / shifters / headset and forks are all that remain from that original bike!
This is how it started life all those years ago.... Frame went on ebay last year, dunno if anyone here picked it up, I would love to see how it was built up.
I typically rode 17" bikes for years, had a go on a mates 15" and it just felt better, easier to whip about, I'm an awkward heigh I guess at 5' 7.....
Short answer..... It just feels better. :-D