If you
were to put it in a timeline for my experience, it's a bit akward...
1989-1994 -- I don't use any Gecko-based browsers
Lynx, or whatever was available on early UNIX shell accounts through dial-up ISPs for use with VT100 emulators, since nothing else was even around yet.
1994-2001 -- I don't use any Gecko-based browsers
Netscape 6.0 didn't exist until 2000, before that I was using Netscape 4's Mosaic engine. After that, I didn't switch to 6 right away because my computer (at that time a 486/33 with 16MB of RAM) couldn't run it anyway.
2001-very late 2004 -- Netscape 6/7; I don't use any Gecko-based browsers
I've always been a Netscape fan for 6/7, otherwise it's Konqueror 2 (yes, Konqueror 2) and KHTML.
2005-present -- Donzilla; I don't use any Gecko-based browsers.
With Donzilla, I make the browser, so of course I use it. I use Konqueror 3.1 (never bothered upgrading) on Linux.
Of course, I've never used any big E-branded Internet softwate running a pitchfork rendering engine full-time; this is mostly a loyalty thing with Netscape, and since Netscape was still by far the best choice for Windows 3.1 over the 16-bit version of IE4.
UserAgent: Mozilla/5.0 (Windows; U; Windows NT 5.2; en-US; rv:1.7.2) Gecko/20040804 Donzilla/0.6PR1 (like Netscape/7.2; wml/1.3)
Laptop: HP Compaq nx6325 - Turion 64 X2 @ 2GHz, 2GB DDR2, 100GB HD, ATI Radeon X300, 15" LCD, Seven Pro
Handheld: Palm Treo 650 - Intel PXA270 @ 312MHz, 10MB RAM, 32MB flash, 2.7" LCD, Palm OS 5.4