Preflop raising

[Guthrie]

After 25K hands my PFR still looks low and dropping as I move up.

7.68 at .25/.50
7.61 at .50/1
7.59 at 1/2

I've been raising everything on the SSHE loose chart, and raising any decent calling hand on the button when it's folded around to me. Now what?

One thing I'm unsure of is what to do after I've raised and been re-raised. Call? 3-bet? Fold? For example, I raise in MP3 with AQo. If it comes back raised, I usually call (I'd 3-bet bigger hands). Should I be re-raising hands like this? Or does that even affect the PFR stat?