villain's been super aggressive, aggro spewtard, not typical for 30s though.. but his limping range was very weak.

This hand shows that he's capable of bluffing in general.

PokerStars No-Limit Hold'em, 31.5 Tournament, 10/20 Blinds (2 handed) - Poker-Stars Converter Tool from FlopTurnRiver.com

SB (t1135)
Hero (BB) (t1865)

Hero's M: 62.17

Preflop: Hero is BB with Q, K
SB calls t10, Hero bets t70, SB calls t50

Flop: (t140) 10, 5, 4 (2 players)
Hero bets t90, SB calls t90

Turn: (t320) 10 (2 players)
Hero checks, SB bets t100, Hero calls t100

River: (t520) J (2 players)
Hero checks, SB bets t240, Hero calls t240

Total pot: t1000

Results:
SB had 6, 7 (one pair, tens).
Hero had Q, K (one pair, tens).
Outcome: Hero won t1000

What about this one:

PokerStars No-Limit Hold'em, 31.5 Tournament, 25/50 Blinds (2 handed) - Poker-Stars Converter Tool from FlopTurnRiver.com

SB (t1084)
Hero (BB) (t1916)

Hero's M: 25.55

Preflop: Hero is BB with 5, J
SB calls t25, Hero checks

Flop: (t100) 8, A, 7 (2 players)
Hero checks, SB bets t100, Hero calls t100

Turn: (t300) A (2 players)
Hero checks, SB bets t200, Hero calls t200

River: (t700) K (2 players)
Hero checks, SB bets t350, Hero ?

Any two-card combination of 5, 6, 7 and 8 just seem to be the last cards you want to see ever vs a loose-passive or lagtard when you have a nice hand. Fish love j7, k7, a7, q7, 9-7, 10-7, 5-7, 5-4, 6-8, 8-9, 8-j, 8-q, 8-5, 5-6, 6-7, 6-9, 6-10, 6-j, 6-k ...you get the point.

I tend to believe opp on these kind of flops.

He has 7-4, for sure.

Congrats if you called and picked him off, but I don't think it's a +EV play UNLESS you have more reads that you didn't give. Flush draws you beat: 3,4,6,9,T high flush draws. You are losing to K and Q high flush draws. You beat all straight draws. Also the disparity between this hand and the first is the preflop and flop action, as well as his bet sizing. Here it's a limped pot, and he fires a decent sized bet on the flop and turn, versus the first hand where he fired a small bet on the turn with a huge draw and a half pot bluff on the river. I think I'd like your call a bit more if you had Q high and knew that he wasn't capable of limping Ax, because that would add J high flushes to hands you beat and remove Ax from hands that beat you.

According to your read he never has A here on the A87 flop. It's annoying for the board to have both an 8 and 7 since that hits his limping range more, but even if he has a pair you usually have 45% equity against it.

You know due to his aggro nature he's going to bet turn and river probably 100% here, meaning by calling the flop you're kind of committing yourself to get the majority of your chips in. If you're going to call flop and turn anyway, I would checkraise flop (to induce a bluff shove as well as fold equity) and shove turn when he calls. Against a player whose bets mean something I wouldn't take this line so I could get information from future streets and potentially make a fold. But his bets mean absolutely nothing since he's always making them, meaning you're not getting good information from future streets which makes putting chips in on the flop more favorable.

but I'm not confident with this strategy tbqh, but it's what I would do

I'd have to ask you one or two things before I give my opinion on your true question here (should I call this J-high for value). You have a 2:1 chip-lead here... are you willing to put 650 chips in (i understand the first 300 chips although I'd play it different--somewhat similar to concrete donkey's thought) with just J-high to try and be a hero? Do you have a clear edge here... do you know you'll get paid off if you make any decent hand because he's so aggro? It seems to me that you're playing hit-to-win poker against a lagtard opponent (bad move) and have decided to go superman on a rivercard and call with J-high.

The one other thing I wanted to point out is your hand #1 is not a good example of 'he's capable of bluffing' as he has an open ender and a flush draw and decides to bet river as well.. yes it's a semi-bluff turned into broken draws bluff on river but this doesn't prove he's an absurd opponent that warrants a later calldown with J-high.

ALSO--more importantly.. please note hand one when he 'doesn't have anything' the flop bet was 90... turn bet 100 (ding-ding) *showing weakness* with way too small cbet on turn... whereas your hand #2 flop bet 100 turn bet 200 river bet 350 (seems to me he has at least something compared to hand #1 which you're basing your 'look he can bluff should I be calling with J-high on).

given board, it's fine. He either has trips or a bunch of missed draws that shouldn't include queen high in it.