man, it's too early on a saturday to actually respond to all the crap in this thread.
The only pro mac users who have a legit software beef with apple right now are FCP Suite users.
Lion works fine. Trust me. I've done Lion rollouts at Hitachi Data Systems, Lucasfilm, and Dolby for over 5000 machines total in the last 6 months or so, all into AD environments using Casper to manage and image the macs. And you know what? It's great! (well, ok, the AD plugin was broken until 10.7.2 came out, I'll give you that. But apple fixed it, and quickly.) Mobileconfig files are a great addition to all the MCX and scripting management tools we already had. Heimdal kerberos seems to be MUCH more likely to work correctly out of the box than MIT was. Filevault 2 actually works, unlike Filevault 1. The new SMB client is fine, and supports more secure authentication methods than the old SAMBA.
Mountain lion adds a nice new security feature (gatekeeper), a BUNCH of new API's for devs, and some iOS apps that should have been in OS X anyway. I see no reason to bitch about it.