There is nothing wrong with being tight in both ful ring and 6 max and seeing something like 20% flops. Despite the others, playing tight does make money. But, if you get labelled you may not get much action on your bigger hands.
Especialy in 6 max, where the best hand may be a little worse than full ring simply because of he fewer number of hands out there, it is probably a better stratgey to see more flops where u can. In full ring you want to be trying to limp, or get into pots in lp with decent drawing hands.
I beleive the stats show that 20% is tight, 25% is an atainable target to make profit with while only the best players can turn good profit seeing iver 30% of flops.
Despite that, as mentioned above, if u can get into a lot of pots for cheap with good drawing hands in position then do so. But where u cant be selective about who and where u play more flops from.