Add facetime to that list. Me and many others haven't been able to use it for over a year due to popping noises. (https://discussions.apple.com/message/27784968?ac_cid=tw1234...) And before the popping there was the intense echo (https://discussions.apple.com/thread/5489176?start=0&tstart=...)

For me osX was the reason to switch, yes, nice battery life (at the time, 2011) was nice but having iMovie for family movies, a pro-Photo-suite for 60$ (Aperture!) and being able to call family (who all have iPads) over facetime were most compelling.

Finder is indeed horrible, it never reconnects my Samba share, it never opens the way I left it and always in a window that I find too small, when browsing to a network share it may sometimes switch from icon view to tree view and the mapping of the folders in home is strange, in the terminal the folders are called differently in my language. And where is sshfs, ftp etc. Really, I have to download Cyberduck?!