Well... I've been thinking a lot about this terminology. On one hand it is useless/oldschool/ugly/trash/weird kind of effect, but on the other hand it can be extremely effective (like described in motivation of my quirky-ux (see talk by Vitaly Friedman of smashingmagazine)).

tl;dr ...websites with a lots of character which break best practice guidelines and design rules are able to capture audience better and produce better results (turnover, traffic, user retention, etc.)

So I ended up finding a neutral sounding word: QUIRKY - having or characterized by peculiar or unexpected traits or aspects.

I would gladly reformat quirky-ux to be primarely this collestion/list of quirky stuff, but maybe awesome-quirky makes more sense or awesome-quirky-ui or something similar...