Hero is young regular plays tight pre and aggressive postflop. mostly only in pots with initiative after raising
Villian is splashy loose reg (400) calls any open ender and flush draw no matter what. type of player that wouldnt check back a hand with very little value at showdown (hands such as k high, q high, weak bottom pair) built up his stack by snap calling a shove with aggressively played aces.

first limper is one of the loosest regs in the casino

2 $2 limps, i raise to 15 with AQo. 3 callers. flop Qh Th 4d i bet 25 he calls turn (90) 8d i bet 50 (should have bet more) he calls. river 5d i check call $75

There really isn't enough info on villain to help us much. How well he value bets and bluffs being the most important. As played I expect we lose to almost everything but missed heart draws and worse queens.

I think check decide is right and go off physical tells in a relatively close spot like this one

You didn't give positions (you're OOP to villain I guess, but not other 2 limpers?) --
Also you're turn pot size is wrong -- 3 callers pre + you = 60 on the flop, +25+25 = 110 on the turn.

Also stack sizes -- I assume you cover villain?

I probably would have played it more or less the same way. Whether or not I bet or check the turn depends on reads of villain which you don't really have, or haven't made precise. In a vaccuum I don't really like betting large or x/calling, so I actually kind of like the 50 dollar bet, though I think I would make it 60-65 just to deny him odds on middling draws. As played I think the river x/call is okay -- I kind of expect you to lose not uncommonly, but you should also be good a decent portion of the time.