Hows my line against this Maniac (2 hands)

My image is Laggy and I have stolen a few pots from this guy, I think hes getting frusterated....(same villain both hands)
How's my line?
Do I raise or fold in any of these spots?

2nd hand I should have raised the flop, but every hand before this one he checked to me, so I was really worried about the King....turn brought flush draw so easy call, river he bet so weakly I felt compelled to call...thoughts?

PokerRoom No-Limit Hold'em, $0.5 BB (4 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

Hero ($68.70)
Button ($69.60)
SB ($79.45)
BB ($9.25)

Preflop: Hero is UTG with Jhttp://www.flopturnriver.com/phpBB2/...iles/heart.gif, Jhttp://www.flopturnriver.com/phpBB2/...iles/spade.gif.
Hero raises to $2, 1 fold, SB calls $1.75, 1 fold.

Flop: ($4.50) 7http://www.flopturnriver.com/phpBB2/...miles/club.gif, 6http://www.flopturnriver.com/phpBB2/...iles/heart.gif, 3http://www.flopturnriver.com/phpBB2/...es/diamond.gif (2 players)
SB checks, Hero bets $4, SB raises to $8, Hero calls $4.

Turn: ($20.50) 9http://www.flopturnriver.com/phpBB2/...iles/spade.gif (2 players)
SB bets $10, Hero calls $10.

River: ($40.50) Qhttp://www.flopturnriver.com/phpBB2/...iles/spade.gif (2 players)
SB bets $15, Hero calls $15.

PokerRoom No-Limit Hold'em, $0.50 BB (5 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

Hero ($58.75)
MP ($18.55)
Button ($44.30)
SB ($71.55)
BB ($22.60)

Preflop: Hero is UTG with Ahttp://www.flopturnriver.com/phpBB2/...iles/heart.gif, Qhttp://www.flopturnriver.com/phpBB2/...iles/heart.gif.
Hero raises to $1.5, 2 folds, SB calls $1.25, 1 fold.

Flop: ($3.50) Khttp://www.flopturnriver.com/phpBB2/...iles/heart.gif, Qhttp://www.flopturnriver.com/phpBB2/...iles/spade.gif, 2http://www.flopturnriver.com/phpBB2/...iles/spade.gif (2 players)
SB bets $2, Hero calls $2.

Turn: ($7.50) 2http://www.flopturnriver.com/phpBB2/...iles/heart.gif (2 players)
SB bets $3.5, Hero calls $3.50.

River: ($14.50) 6http://www.flopturnriver.com/phpBB2/...miles/club.gif (2 players)
SB bets $5, Hero calls $5.

From a vacuum, my standard play would be:

1st hand: fold the flop to his checkraise.

2nd Hand:
PreFlop:Why raise 3 BB? Raise 4BB. But thats just me.

Flop: Generaly fold or re-raise (75% fold, 25% re-raise). Remember, I am speaking from a vacuum. reads are very important. I don't like the call.

Turn: Reraise to Pot size, or Push. (Since you made it this far)

I forgot to mention that I had a note on him that says "Bets every street very fast when bluffing" and this is exactly what he was doing. Plus he was frusterated with me after i stole 3-4 pots from him 5min before.....

So tell me why am I folding to his check Min raise in hand 1?

I usually do raise 4xbb at this limit, but I like to mix it up sometimes.