JH1,
I'm no expert here, but I see a few things and will give an analysis a go.
First, look at how your game has changed when you moved from 10NL up to 25NL. At 10NL, your VPIP and PFR percentages were 14.6 and 7.6, respectively. At 25NL, your stats are 12 and 6.5ish. You run considerably better at 10NL with 7.28 ptbb/100 (granted in only 1/3 as many hands) than you do at 25NL with 1.72 ptbb/100. Why do you think you're playing differently at those levels? IMO, the competition is not that much stiffer at 25NL than at 10NL. Figure out which style you're most comfortable with and stick with that.
Second, if you want to play 14% of your hands, then I would try to raise closer to 10% of them preflop. I think in general you want to be raising closer to 2/3 of the hands you play as opposed to 1/2 of them. I try to keep hand ranges in mind for the game I'm trying to achieve. For instance, a 15% VPIP would be any pair, AK, AQ, KQ, suited connectors 45+, and any suited A. Now, for your raising range let's say for the sake of argument that you want closer to 10%. So, your raising range would be any pair 66+, AK, AQ, suited aces, KQs and QJs. (These are just examples ranges, obv. you should play/raise the hands you're comfortable with.) I would try to close the gap between your VPIP% and PFR% such that they are closer together.
Third, your W$WSF at 10NL is pretty close to 35%, which is good, but this stat is a little off at 25NL at only about 33%. I'd personally try to get as close to 35% as possible. When you are the preflop aggressor, how often/what % of the time do you cbet? Again, I think your stats are telling you that you play differently at the two levels. What worked for you at 10NL will most likely still work at 25NL, IMO, so maybe try to figure out why you are playing differently and go back to the confidence you played 10NL with.
Fourth, in order to be considered aggressive, I think your AFs need to be above 2 on every postflop street. Your river AF is suffering here and as you stated in your OP, maybe you need to take a b/f line more often than a c/c. I need to work on my AFs so I'm afraid I'm not much help here.
Fifth, positional stats look okay to me. I think in general you want to raise 2/3 of your VPIP%. You open up to a VPIP on the BTN to 18% and are raising 10% of those hands. I think you could probably get away with raising more than the top 10% from the button, but, again, it's what you are comfortable with. I usually play an overall game of 13/8, but am trying to get closer to 14/10 and from the button, I'm 20/14. I would raise more than 10% from the button is what I'm trying to say here
. Your other positional stats indicate that you are seriously tight until you are in the HJ position. In every postion other than HJ/CO/BTN, you are raising less than 5% of your hands (pairs 77+, AK, AQs). Do your positional stats change between 10NL and 25NL?
Okay, that was a quick and dirty as I just finished a session. Again, take my opinions for what they're worth as I'm no expert. I personally find that I play differently as I move up, too, and I'm trying to keep myself from altering my game too much as my style has been profitable thus far. The games get harder as you move up, but I think you clearly play a little bit differently at 10NL than at 25NL and this may be what's effecting your ptbb/100 since the competition isn't necessarily that much more difficult/different between the two levels.