HP by default
It may just be me, but I have had problems with Epson drivers and printers going back 10 years or so. Print quality is great on their printers, but I have had some difficulties making them work properly when attached to my Powerbook and several Windows machines.
The most recent was the Epson driver for an ALC900 (colour laser) which would not print from my PB to the Epson attached to a Windows PC (no problems with various HP and Canon printers attached to the same Windows PC at different times).
Also a 6 month old Epson C62 that, for some reason, stopped printing black. Ran diagnostics, reset printer, reinstalled drivers, replaced ink cartridges several times ($$$) and eventually threw it out.
I have had fewer problems with HP printers - have used them since around 1988 - but these days I tend to buy Canon.