For day hikes, I have an old, faded pair of Columbia pants, with patching sewn over holes in the back pockets and knees. They are comfy, and they have a zipped pocket on the right side, which is helpful.
On longer outings, I have a pair of green Patagonia cargos that pack up nice and compact, and are comfortable year-round.
Lately, though, I have been wearing cargo shorts. I intend to keep it up until the first snowfall.
In terms of upper wear, I once splurged on a nice Patagonia under-layer with a zip neck. It is awesome year-round, and well worth the investment. For warmth in the Spring, Summer, and Fall, I like to bring a flannel shirt. It is more compact than a sweater, but just as warm if I wear it with my under-layer. Other than that, I have a bunch of thin, breathable shirts from MEC that work nicely.
All the best,
- Mike