I want to share a very funy hand, which, despite the outcome, I still consider to have been played +EV. Please challenge that, if you think otherwise 
The story goes so that I found myself at a table with what looked like an extreme fish. He or she was deep-stacked at almost 250BB, so has obviously sucked-out wildly on fellow less fortunate players in the recent past at the table, and probably must have been feeling godlike by the time I sat just to the right of it. Anyway, I decided I to try to play more hands with this guy, if opportunity arises, and not long after I faced myself on the BB, having position on him being UTG. Not a perfect spot OOP, and the 6Ts I collected was not perfect either. But...
I had earlier collected some 41 hands on this guy, and with my huge database that also told a story of its own. Anyways, he had VPIP of 88%, PFR of 15%, ATS of 10%, AF 3.8, Cbet 100%, fold to Cbet 20%, WTS 37%, and from the little information I had looked like super aggresive both before and after the flop, check-raising every second hand and so on
I didn't see him raising previously, so his 2BB raise from UTG left me wondering if he was slowplaying a monster, making a typical raise, pushed the wrong button, or was doing any other of his random plays. At any rate, I decided to put him on a 40%+ hand range on that one, and after everyone folded (is this NL100 or whut???), 3.5:1 pot odds were obviously good enough for me to call, even out of position.
Flop came rainbow J73, leaving me with two undercards as well as backdoor straight and flush draws, a monster hand by all means ♦ However, after I checked and he Cbet 1BB, giving me pot odds of 4.5:1, I figured my hand was still good (Equilator later confirmed that I was right), and I had enough equity to call. However, seeing his miniraise + extremely small Cbet as a sign of weakness (I thought he would probably check a monster here), I decided to check/raise him, pretending to have a strong made hand (or semibluffing a straight draw). Only to find myself re-reraised, which I called again due to the pot odds
Turn cometh the 8, I improved to the gutshot However, as a potential straight lay there, I decided to keep my image of having made it for real (or protecting against a draw with my made hand) and pushed.
The rest is history. River brought the 9, and I sucked out on his QQ. I nearly fell off my chair when the cards were revealed, for having played my first hand with the apparently worst fish I've yet to witness, I saw him holding QQ, and me beating him with 6Ts 
Who's the fish now? 
Anyway, I would like to hear if you agree that my play wasn't really that bad:
PokerStars No-Limit Hold'em, $1.00 BB (6 handed) - Poker-Stars Converter Tool from FlopTurnRiver.com
CO ($74.30)
Button ($50)
SB ($78.40)
Hero (BB) ($21.50)
UTG ($245.90)
MP ($58.55)
Preflop: Hero is BB with 6
, 10
UTG bets $2, 4 folds, Hero calls $1
Flop: ($4.50) 7, J
, 3
(2 players)
Hero checks, UTG bets $1, Hero raises to $4, UTG raises to $7, Hero calls $3
Turn: ($18.50) 8
(2 players)
Hero bets $12.50 (All-In), UTG calls $12.50
River: ($43.50) 9 (2 players, 1 all-in)
Total pot: $43.50 | Rake: $2.10
Main pot: $43.50 between Hero and UTG, won by Hero
Results:
Hero had 6, 10 (straight, Jack high).
UTG mucked Q, Q (one pair, Queens).
Outcome: Hero won $41.40 
