3! Nothing beats PvPing in epics trying your best to protect your flag until the arcane hooks & mythic helm rogues walk over you.

2nd? I prefer s4, because that was when I started becoming good. That season was fun, got about 2-3k kills in there which, considering I was non-mythic with Champions' gear, was pretty darn good.

3rd was s5 beginning & the ctf matches towards the end. That's where I got all my kills