Yeah +1 to Hillbilly here...
Edit: Sorry, this got pretty long... Basically all of the stuff below is me trying to help with giving you a reason to play more hands, and pointing you in the right direction for if you feel a bit lost with trying to widen your range
I've been where you are though man, and these are the things that you will most likely need to take into consideration and work on with regard to your game:
1) Table selection: No high VPIPers on your left, that's -EV, you want the fish on your right, table selection is huge. Get the high VPIP fish on your right, nits on your left if possible, that way you can steal lots of blinds, this is +PFR+VPIP for you. Every time the fish on your right LIMP, you ISO-RAISE. If they fold to c-bets a lot (check HUD), you can iso-raise with a wider range (+PFR+VPIP) and aggress to take down the pot on many flops, which leads me onto my next point...
2) Board Textures & Villain Ranges: Once you know how to read a board and villains' ranges, you're pretty much all set, this allows you to confidently play a wider range of hands. Atm you're playing mostly your best hands. If you know how to react to different board textures, and how to assign a range to your villain properly, you can BALANCE the top of your range with lesser hands but still rep the same strong holdings vs. the right opponents. This means you'll get paid off more vs. the right opponents (by being loose enough), and you'll also command enough respect vs. the right opponents in this regard (by not being too loose). Initiative, initiative, initiative. Initiative is huge. That's all I'll say about initiative.
3) Betting and Not Betting: Post-flop, you always need to be asking yourself "Can I get a better hand to fold?" and "Can I get a worse hand to call?" when it comes to your betting decisions. You've most likely heard this before, but just practise thinking these questions to yourself when it comes to every single betting decision. Obviously you need to be able to put your opponent on a range of hands, so this goes with point number 2. Positional dynamic is huge when it comes to betting decisions, also. Oh and... "Do I have the initiative?" - Lol.
4) 3-Betting Strategy: I can't really be bothered getting into this in any detail, but a solid 3-betting strategy is vital for anything above 25NL, and useful at 25NL and under. Look into this. Positional dynamic is also huge when it comes to marginal/important 3-betting decisions.
Sorry if this all sounds a bit patronising like I think I'm a total expert or something, obviously you're a winning player over the 25K hands you've played, and at the lower stakes it can often be as simple as waiting for hands and getting value from them, and that's all good, but if your aim is to move up the stakes and at times where your variance isn't good and you're wondering what you can do to really start crushing levels and to be able to crush the top end of the micro and low stake games with a healthy red line (non-showdown winnings) that can oftentimes counter-act some of those all in bad beats that we get, then look to these areas of your game. For a player who is well versed in all of the above, his PFR is never below 15. I ordered these points in order of importance, but 2 and 3 were pretty close, could easily swap them round. Oh and... Position and Initiative.