hi, most of my reasons to use #! have already been mentioned here. basically :
1. ubuntu repository base. i do not use freaky packages, but i am used to them
2. no bloat, compared to kubuntu (i used to prefer kde to gnome), or even xubuntu
3. things work out of the box, no need to use secret repos or other gnu-puritan inconveniences
lately i have mostly been using kubuntu (last 3-4 years), before i used kde on debian, but was looking for some lightweight alternatives, which led me to zenwalk (pity it was not ubuntu based), easys (featuring a lightweight KDE, it was very nice, konqueror it's quite cool), DSL, hikarunix and finally fluxbuntu (fluxbuntu was promising, hopefully they can merge efforts with #!). before i had used also suse 8 & 9 (it was great), mepis (made big steps towards usability), knoppix (v3 marked the most important milestone in linux), debian 2.2, redhat 5 & 6 ... . i have tried many other distros, and now i am quite happy with #!, i am trying it together with mint 6 (i am surprised a default mint installation uses less disk than #!, but this is not a big issue).
so i want to thank corenominal and the people involved in work here. is there a tracker or a list of jobs to be done?