2nd pair top kicker vs aggression
 

Villain is 42/4/3 in 77 hands.

PokerStars 1/2 Hold'em (6 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

Preflop: Hero is SB with A[img]/images/graemlins/heart.gif[/img], Q[img]/images/graemlins/club.gif[/img]. CO posts a blind of $1.
UTG calls, <font color="#666666">1 fold</font>, CO (poster) checks, <font color="#666666">1 fold</font>, <font color="#CC3333">Hero raises</font>, BB calls, UTG folds, CO calls.

Flop: (7 SB) 5[img]/images/graemlins/spade.gif[/img], Q[img]/images/graemlins/diamond.gif[/img], K[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">Hero bets</font>, <font color="#CC3333">BB raises</font>, CO folds, Hero calls.

Turn: (5.50 BB) 8[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">BB bets</font>, Hero calls.

River: (7.50 BB) 6[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks

I think folding this is out of the question. Should i be more aggressive here (3betting flop, lead nonspade turn) or is a calldown best?

Re: 2nd pair top kicker vs aggression
 

against a 42/4/3 calling down seems fine to me. against a 22/14/3 i could find another raise somewhere. also 3 is pretty aggro for a 42/4 so maybe he is on a draw. maybe betcall river?

Re: 2nd pair top kicker vs aggression
 

I think if he's got AJ, he could bet the river here, but won't necessarily call a river donk. So I would check and call the river and let him bluff away his flush/straight draw. Thing is, you don't expect him to be on a draw because he would want to keep the other player in on the flop with spades or JT.

Betting the river is problematic because getting raised is no fun plus you kinda expect villain to have a King (or be on a 3-barrel semi-bluff). You do get called by worse Queens, A5 etc., but you may get raised by a worse hands and better hands alike. Also, villain might check the river with some Kings, fearing a bad kicker. So bet/calling the river is something to consider certainly, but I would just check.

Re: 2nd pair top kicker vs aggression
 

i would raise vs anyone anywhere(basiclly)

Re: 2nd pair top kicker vs aggression
 

c/c the river. if he has a K, nh