You're crazy.
Happy now?
Actually.. I started out in that boat, then I got spoiled with emacs and the syntax coloring and auto-indenting (nice for when you make changes and don't want to hand re-indent a bunch of lines)
-- For Sleipnir to add to the FAQ if he likes --
And now, that someone else is footing the bill, I'm really won over by Zend Studio, at least for the big jobs.
It's still easier for me to pop open a simple text editor for alot of scripts, but for my projects with 50+ files and 10's of thousands of lines, the IDE really pays off in time saved.
The debugger is quite nice as well for some of those hard to track down problems when you just don't feel like footprinting all your code to find the specific problem.
It's not perfect, there are certainly changes I would make to it if I had the chance, but it's a very nice tool, and quickly becoming invaluable to me on my larger projects. Not to mention the fact that I spend alot less time at php.net determining the argument order for rarely used functions as it tells me straight away what to do.