Still not so sure about 6 max

[melioris]

if you are better than the average player at your current level, the less players per table will magnify that difference. therefore HU > 6max > FT. The trade-off is with less players, the variance increases, which is why for at the same level, bankroll requirements tend to go up when playing at the shorthanded tables. Also, as a µ-grinder, shorthanded games will increase the rate at which you improve. This is two fold, first, you will get more hands in per hour, therefore you will gave experience faster. And then, you will play OOP more (a % of the seats in shorthanded games are OOP) and you will learn how to play these more challenging (and usually less profitable) seats better.