...So I posted here but I never actually voted?

I'd have to say my favorite was Season 2, but with Season 3 as a very close second. As much as I liked the moderate variety and all in Season 2, there were a few things that were better in Season 3: the tone of Olmec's voice (with the bad side effect of less intelligibility), the Temple layout (the thought of keeping a consistent layout for fairness wasn't THAT bad, and hard as it was to get through, this might have been the best layout the show featured), and some of my favorite Temple Games (although it seemed like there weren't as many different ones as in Season 2). The historical inaccuracy and cases of extreme leniency at the Steps dragged it down a little, along with some of the contestants, but what can you do, really?
So yeah, Season 2 since it seemed to hit the happy medium in the variety department, and also featured many of the most memorable episodes.
