for 6-handed I was 35% VPIP and 9.5% PFR - far too high VPIP compared to PFR imo.

Some things that I'd think would improve your game would be to:
- Stop limp/calling, it's a weak play, it's so easy to make money from players that do that. The only hands I'd do this with if any is 22-55. If you're first into a pot, raise, aggression and betting is the way to win.
- Without going into detail on the hands, play position, it's sooooo important, on the co and button you can play a lot of hands. I'm raising A6+, K9+, Q9+, JT, all PP, SCs from 45 and up, suited gappers, etc from the Co and button, and I play pretty tight UTG and in middle position.
- Play very tight from the blinds, don't call raises or raise without real good hands.
- Find out wich players will fold on flop if they miss and continuation bet, value bet the calling stations.
- AA/KK... push preflop? Pushing a 100bb stack after a 4bb raise is not good... especially not with KK...Just make your normal preflop raise, if someone raise before you reraise them 3-4x their raise or something. And the calling to trap thing with AA/KK is bad at 50NL imo.

This is basicly how I played at 50NL at least. Also make sure you get reads on the players on your table.