PHP, for the good of mankind. I cannot understand a single line of Perl, not to say that ASP is really strange for me... what you can do in 2 lines writing in PHP, you need 5 for ASP. I can't say anything about Perl as I don't know it, but look very complicated for me. Also, connections to a database are pretty much easier with PHP.
It's a metter of taste, though. I go for PHP, always