Definitely better watching from the beginning
I jumped in on the last episode of Season 2 and didn't enjoy it going into 3:1. Went back and watched from the beginning and realized there were some really great episodes (mostly in season 2).
Season 3 - what the hell was that? I mean, not horrible, but a complete 180 from the first two seasons which were sort of light hearted and funny to third season drama based off of a side character from the previous seasons.