[grogheadflow]

Some guys just aren't capable of turning pairs into bluffs, and on this rainbow flop/ call turn that's essentially what he'd have to be doing (barring 34s or some other unlikely holding). I've seen hands where the likes of Nano CR the river here with JT for example.

So, if we think it's a stretch that he is turning some hand into a bluff, then I think he very plausibly reps Jxhh, or 5xhh. I think any ace that he donked would keep firing on the turn so I don't see AJ or AQ (which get 3bet a decent % anyhow), and I think rarely does QJ go for this thin raise (though more likely if on tilt).

In summary, it looks like a pair+bd flush, but given that's a relatively small number of combos it'd come down to how good I think he is. Mr 400NL who can't have JT here I fold, maybe someone much better and creative lean towards a call. Given all your stated reads, and including the fact he *might* be tilted enough to do this QJ, I'd call.........