I use both at work all the time, too. I tend to prefer VS, too, but there's some points where Eclipse really shines. Eclipse's continuous build, for example, is excellent. Your tests start immediately when so requested, where VS 2010 decides to first build all of the projects in the solution. Especially once the solution gets fairly sizeable, this becomes unproductive very fast. There's workarounds, but I don't want workarounds. I just want it to work immediately.