im tighter than you - 21/18~ but, you could probably get away with stealing the blinds a bit more, 30% att to steal is the min you should have. you could probably also raise more hands preflop, when i try and play LAG my stats are usually something like 25/21 (UTG vpip is like 7).

All in all, just keep playing the way you are if your comfortable with it, your winning at a nice winrate. Keep it up.