Thread: What Should I Learn Next?

Languages I currently have an excellent grip on:

HTML/XHTML
CSS
JavaScript
C++

Languages I'm good at but not excellent at:
PHP
Python
Ajax (I know I know it's only a technique, don't shoot me.)
XML (Not a language per se...)

Things that I would find useful to learn:
ASP
Java
C#
.Net
SQL
Perl
Ruby/Ruby on Rails

What should I go for next? I'm thinking Java but I've had issues with trying to get my computer set up to do that and in general I have no idea how.

As for what it is that I want to do, a simple question yet it often steers the path programmers take, is this: create stand-alone applications like - and these are only examples - Minesweeper or Microsoft Office. Gaming seems to be a hugely popular thing but I'm not necessarily looking to get into game development. Also with networking, I'm not very interested in that (although I was taught it in high school) but if it's a major thing - and it probably is - I can invest time into it. I could stick to my web development niche but to me it seems rather limited.