I have been running Windows Server 2012 (Standard) as my main desktop for the past couple of months and I absolutely love it... I installed it onto an IBM x3100 M4 open box special ($400!) that I had picked up and after I added 32GB of RAM, an nVidia Quadro 600 and 5 (JBOD-configured) hard drives to it, the thing absolutely flies. Last night I had 2 VMs running in the background, 1 XP the another with an install of Win7 in progress and meanwhile I was playing a game of WoW on high-quality.
I did not replace the start menu because I like the big tiled-display. The only thing I miss on this new start screen is Jump Lists because I do not pin things to the task-bar (I prefer quick-launch), so Jump Lists are effectively useless to me now. The only usability tweaks I installed are: 7 Taskbar Tweaker and AutoHotKey. Other than that, the thing just works.
I did not replace the start menu because I like the big tiled-display. The only thing I miss on this new start screen is Jump Lists because I do not pin things to the task-bar (I prefer quick-launch), so Jump Lists are effectively useless to me now. The only usability tweaks I installed are: 7 Taskbar Tweaker and AutoHotKey. Other than that, the thing just works.