Unknown, over 10 hands seems like a fish.

I'm thinking on the river that he either has 2p, hit the ace or he's folding as we block Qx, so I might as well shove right?

Also would you use positional raise sizes at NL25-50 as standard? (3.5bb UTG+MP since my ranges are very simmilar, 3 CO, 2.5bb BU as standard?)
It kinda sucks that I'd have to transparently exactly pot it to have a psb left on the river when I raise with my strong utg range. I do change my PF sizing when I know a fish is on the table, but you know how easy it is to autopilot PF.

I know I used to do it but it tilted me and leveled myself a lot

pot pre and hole pot will be bigger by the river

i wouldnt give people much credit for reading betsizes, i usually vbet accordingly to perceived strength of opponents range ; here i would probably vbet around 8? to get called by an 8, 99-jj, Ace that was drawing to flush

3.5 UTG , all the other 3x i do it so ,
bcuz in rush 2.5bb BTN got 3b lighter imo
also i saw some ppl steal from BTN > 70% with 2.5bb open
I WOULD USE ANY 2 TO RESTEAL
and I dont think shove river got called that often , even u r bluffing here u probably never overbet shove