
I have been using Linux since 1993. I installed the first version of Slackware on a 16MB 386sx-25. Since then I have been using it almost exclusively on one or more of my PCs. So I consider myself as a bit of an expert. I have been using computers since 1982 mostly PCs, but also VAX mainframes and SPARC systems. Operating systems (and GUIs) I have been using include CP/M, DOS, Windows from Version 2 to XP, Geos, Beos, SCO Unix, Solaris, OS/2 and quite a few Linux Distros.
There's a few legacy apps which require gtk1 (eg. XMMS, older version of Grip, Gimp and gtk1 Mozilla binary) where non-AA font are being used; in that end you can modify the UI font of gtk1 application according to this How-To:
http://www.linuxcompatible.org/thread27498-1.html