[xyzzyb]

For me, it's the ease of use, the HTML bundle's shortcuts for quickly slicing through markup, the automatic recognition of languages embedded within languages (JavaScript bundle and syntax highlighting automatically activated when the cursor is in JS code inside HTML). The easy macro recording doesn't hurt either.

AckMate solved the only real issue I had with TextMate, so I'm a pretty happy coder with it now.

[zem]

yeah, textmate's nested language support is one of the top two features i really wish vim could steal from other editors (the other is lisp scripting from emacs)