I used to use Vim, and then I got a job after college working with .NET (this was in 2003). Since then I've used Visual Studio as my primary IDE. Its features (or that of Eclipse) seem to (pardon the pun) eclipse the crap out of Vim. The contextual information you get in VS by hovering your mouse on any variable, the built-in debugging, etc. Studio isn't a just text editor, it actually understands the semantics of your programming language, it helps you write better code faster.