3 season : Arcteryx rampart, I think it's tough enough for bushwhacking. I find cargo pockets way to useful but in this case it really not that noticeable.
Summer : Columbia silver ridge (convertible), light, very fast drying, easy to catch stuff and to stain.
Long sleeve shirts
Golite wildwood (would love it with a zipper),
REI endeavor shirt
icebreaker gt200 - has thumb-loops, 1/4zip but feels deeper, mesh like panels on the back and under the armpits help with ventilation I find.
REI Sahara is bomber but I find I take the endeavor more often