Folding KK preflop?

You know that feeling, you think he has Aces but you push anyway because you have Kings? I mean who folds KK preflop, that's weak poker! Or is it?

Hand 01:

Villan is TAGish and plays very straight forward, first hand he plays in about two orbits.

Party Poker No-Limit Hold'em, $ BB (6 max, 6 handed) FTR converter on zerodivide.cx

SB ($321.93)
BB ($127.30)
UTG ($13.10)
MP ($130.05)
CO ($96.50)
Hero ($105.50)

Preflop: Hero is Button with K[img]/images/graemlins/spade.gif[/img], K[img]/images/graemlins/heart.gif[/img]. SB posts a blind of $0.50.
<font color="#666666">1 fold</font>, MP calls $1, <font color="#CC3333">CO raises to $4</font>, <font color="#CC3333">Hero raises to $12</font>, <font color="#666666">1 fold</font>, BB calls $11, MP folds, CO calls $92.50 (All-In), Hero folds, BB folds.

Final Pot: $122

I mucked and it felt ok to fold here IMO.

Hand 02:

Villan has been pretty passive, he hasn't raised much preflop. Min raise + 3bet smells like Aces?

Party Poker No-Limit Hold'em, $ BB (6 max, 6 handed) FTR converter on zerodivide.cx

Hero ($96)
SB ($104.60)
BB ($241.13)
UTG ($97.30)
MP ($89.42)
CO ($142.18)

Preflop: Hero is Button with K[img]/images/graemlins/heart.gif[/img], K[img]/images/graemlins/club.gif[/img]. SB posts a blind of $0.50.
<font color="#666666">2 folds</font>, <font color="#CC3333">CO raises to $2</font>, <font color="#CC3333">Hero raises to $8</font>, <font color="#666666">2 folds</font>, <font color="#CC3333">CO raises to $25</font>, Hero folds.

Final Pot: $34.50

Ugh... That's twice in 20 minutes I've folded Kings (breath in...breath out... fold).


Hand 03:
This is in a full game a couple of months ago.
No specific read on Villan.

Party Poker (10 handed) FTR converter on zerodivide.cx

Preflop: Hero is BB with K[img]/images/graemlins/heart.gif[/img], K[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">7 folds</font>, MP1 calls 152.30 (All-In), Hero calls 101.50 (All-In), <font color="#666666">1 fold</font>.

Flop: K[img]/images/graemlins/spade.gif[/img], 7[img]/images/graemlins/heart.gif[/img], 4[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players, 2 all-in)</font>

Turn: 7[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players, 2 all-in)</font>

River: 2[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players, 2 all-in)</font>

Final Pot:

His weird cold call preflop made me do it, should probably have folded this hand too? I mean, lets get real, can I really expect to see QQ or AK here that often to make this call profitable? I sucked out goot anyway!!

Hand 04:
This hand is also acouple of months old.
Pretty much the same scenario as the second hand, same type of player.

Party Poker No-Limit Hold'em, $ Hero (6 max, 5 handed) FTR converter on zerodivide.cx

Hero ($95)
UTG ($57.62)
MP ($45.80)
Button ($133.24)
SB ($88.20)

Preflop: Hero is BB with K[img]/images/graemlins/heart.gif[/img], K[img]/images/graemlins/club.gif[/img]. SB posts a blind of $0.50.
<font color="#666666">2 folds</font>, Button calls $1, <font color="#CC3333">SB (poster) raises to $1.5</font>, <font color="#CC3333">Hero raises to $7</font>, Button folds, <font color="#CC3333">SB raises to $29.5</font>, Hero folds.

Final Pot: $39



Are most of these hands standard folds, or do most of you guys push/call here?
I've logged 20k hands at this level and had KK 98 times. Folded them 3 times preflop.
It's not really the end of the world if I'm wrong and the guy has QQ or AK one of those times right?
Looking at my pokerhand database and looking at these preflop situations, the 3 bettor has Aces almost everytime given that he's not a total LAG.
I feel pretty good about the way I played the hands I posted, I don't think it's weak but what do you guys think?
What do you do in these situations? I'd like to hear your thoughts on folding KK preflop in a cashgame.

Thanks!
Rob