I am surprised php is not up there. I found that the easiest to learn, not including html. I have used php for many different projects, and like having dynamic webpages. You can normally learn it in a few days if you are a quick learned and very talented.
I think php is easier to learn and use. I know some asp.net, but I just have not got the hang of using it on websites. I find asp.net hard to learn, but normally easy to use, if you know what to do.