I've really enjoyed season 3 (Ortiz VS Shamrock) the most so far. Its' got one of my fav. fighters (Matt Hammill), and even besides that, the whole season was just really good. Well, they could have done without that Solomon dude. That dude was just a waste of space. Anyway, I just thought everything about the season was great. From the in house bullshit, to the fights. I've only watched a couple episodes, but, season 5 (Penn VS Pulver) also seemed really enjoyable.