Villain is a decent reg, standard tag preflop, postflop a bit more to the aggro side.

Check-back or bet/get-in?

Also what about flop decision?

Bet-call as a standard for sure.

you are almost always ahead or have decent equity with redraw

+ only heart and Q 4 3 rivers are good, everywhere else we are quessing

The very little I know about plo... and looking at you better players hands like this - makes me realise how little I do know.

That being said - isn't this an automatic bet/call? man plo is a crazy game

At first I thought it was a pretty clear bet get-in, but I started thinking about it after seeing his cards (some Q456 + hearts) and wasnt sure, so I just asked because doing the math for the check back scenario is kind of difficult.

I still think its a bet/get-in, but I thought some people might advocate a check back.