I likes me some earth tones, but I'll give grey a shot next time. There's some brown and green mixed into the shirt that I think complements the pants, but obviously you can see approximately none of that in the photo.
Undecided on keep/return. Has less to do with cost (minimal) and more to do with available closet space (also minimal).
Cozy but kinda boxy. Would probably wear with less slim jeans / less sleek footwear.