What I'm enjoying most about this thread already (and we're only a few posts in) is the different perceptions people have for the same lenses...
Four of the lenses mentioned so far - the DA21, DA35/2.4, FA50/1.4 and Sigma 30/1.4 Art - rank amongst my personal favourites, at least so far as the modern AF glass in my own collection is concerned; whilst the HD DA20-40 that I called out is beloved of many members here, yet hasn't worked its magic for me yet.
This shows how risky it is to put too much faith in reviews, be they from test sites, the press or other forum members. Such reviews can provide useful information, but whether a lens is good, bad or average - and why - is largely down to the photographer and his / her personal tastes for field of view, rendering, contrast, colour reproduction, etc.
An enjoyable thread, this one