I think it was 180 for me.
All skills I need are capped and I have equipped the armor I wanted (QL 200 So8, lvl 180) so it is really hard to find reason to level more (although I know there is one, which is AMS/DMS).
The good thing is that I dont anymore feel particular rush to get those levels though so I actually enjoy more about AO now and been playing with my little Fixer lately (lvl 124 now).
That 183 lvl char is now mainly used for tower wars and to buff guildies but I expect that 150+ I will switch to use this Fixer in tower wars also... well maybe, who knows. I really like playing Agent in tower wars too
Zarch and da chars (Agent Daquis is the 183 one)