How should I set up my coding environment for PHP, mySQL, and JavaScript development?
I have about 7 years of experience coding in a Windows environment before I got my first mac early this year.  So I know exactly what you're talking about.  I was very used to the combination of Visual Studio for c++ and .net, Notepad++ for .bat and other scripting and lightweight tasks, and the occasional bit of Eclipse for java.

When I first started using my Mac, I was frustrated by what I saw to be a lack of equivalent software for OS X.  I tried different IDEs and text editing solutions (Eclipse, Aptana, Textmate, Smultron, Fraise, etc), but like you said, nothing really 'clicked'.

However, at some point I stopped looking for replacements and started using the tools that were commonly used on *nix machines.  Particularly vim.  I've found that once my expectation of finding software equivalents to everything I had used on Windows dropped away, my horizons broadened.  I feel like my interest in coding has been renewed because I'm learning a completely different way to work and think about the process.  I'm using the command line way more than I ever have in the past, and this has translated into new techniques even in my Windows development (like using powershell and command line versions of tools rather than the gui).

I was in a huge programming rut before I started using my mac, but I'm finding that being forced to look at my process and tools in a different way is really bringing out talents and interests I didn't know I had before.  I'm coding in python and c++ rather than javascript and c#, in one of the oldest editors in existence, and I'm loving it.