What should I do?

[Guernica4000]

I will keep this post brief since it is late and I need to sleep.

I have a much better win rate at the 10/20 and 15/30 tables than I do at the 3/6 level. My problem is that I have a bankroll for 3/6 (350BB) and really shouldn’t even be playing 15/30 but every once in a while I play higher limit tables with great results.

So my question is:

Should I disregard the 300BB rule and play at a higher limit or should I keep playing at 3/6 since I can afford a down swing with my bankroll?

A few numbers from PT:

3/6:
20,612 hands
BB/Hr 1.8
VP$iP 19.5%
W$wSF 46.3%
Aggression 1.62

5/10, 10/20, 15/30:
3138 hands
BB/Hr 3.7
VP$iP 21.1%
W$wSF 48.8%
Aggression 1.83

I know that my sample size is small for the second part since I don’t play all the time, but I guess my question could be. Can a player’s style make him better for higher limits? And if so what style would that be?