Many 1337 crits and other damages ofc etc., but one i always remember: on vanilla, my warlock got 1337 armor. I even took screenshot of it. It was "omfg lol xD look what i have!1" then, nowadays i would just be "meh".
When i was doing arenas on 2v2 only for points, we ended 667 rating and just lost one game on purpose for -1 rating...