i am currently using gedit. i changed the colours to not be like notepad, but to be white on black. gedit has the mouse based attitude of notepad, but the syntax highlighting of any real editor. i prefer it to bluefish now too, because i am sick of bluefish helpfully putting in the closing tags, for some reason i usually put in the closing tags firt in html, and then i have to delete the duplicate ones that bluefish creates when i do the opening tag.
also, since i use XFce i have to admit that mousepad is a good GUI one, similar to notepad basically, no bells and whistles at all.

i'll still use vi (or whatever /usr/bin/vi points to) if i don't have a gui though, or if i am working in an xterm.