Well, I don't want to be presumptuous, but with the approach, discipline and attitude you have, I'd guess your ambitions are to move steadily up the levels until you feel you are where you can make the most from the game in the medium to long term. My ambitions are to have fun and make some pocket money, and not get too stressed about it

16/8 is VERY nitty for 6max. You could probably do with opening up a little more, but it's certainly not an imprudent way of playing. I'd definitely up the aggression, though - you do want your PFR to be in 2 figures, of that I have no doubt, especially at 25nl where there are relatively more limpers and weak players and you can more often gain control of the pot. This will also give you isolation more often, which is a better spot for post-flop aggression.