PokerStars No-Limit Hold'em, $0.10 BB (8 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

SB ($10.15)
Hero ($10.90)
UTG ($12.30)
UTG+1 ($9.80)
MP1 ($4.65)
MP2 ($2.20)
CO ($11.80)
Button ($19.60)

Preflop: Hero is BB with A, K.
UTG calls $0.10, UTG+1 calls $0.10, 4 folds, SB completes, Hero checks.

Flop: ($0.40) K, A, 6 (4 players)
SB checks, Hero bets $0.4, UTG raises to $1, UTG+1 folds, SB folds, Hero raises to $4.6, UTG calls $3.60.

Turn: ($9.60) 4 (2 players)
Hero ???.

I realize I'm going broke here all day if I'm beat, but against an unknown (I just sat down), what does his reraise, and flat call seem like? Would it be a set, a combo draw like a pair and FD, or SFD, or possibly a weaker two pair, or just say AQ-AJ?

He could have 666, but it is more likely he has one of the other hands you mentioned such as JcQc, pair of aces or just a flush draw. Either way, there is no real decision to be made, the turn card is a good one for you and you just need to stick your last ~$6 in there.

Actually, unless he is a poor player this should almost def be a flush draw, a set would push flop over your reraise.

Shove in your remaining 6.20. At these stakes, it's a combo draw or weaker two pair far more often than a set.

If I were the villain, you could eliminate a naked flush draw (e.g., 8 9 ) because of the small raise on the flop. Some people think they can do the free card play in NL, so you can't really even eliminate that.

As you say, it really doesn't matter. You're getting your money in.

I wouldn't consider limping with AK as slow playing. It's just passive.

get the rest in, that's all.

I'd put him on an ace most of the time and a flush draw some of the time. It's not AA or KK hardly ever since there is no raise preflop, so 66 is realistically the only hand you're losing to. Obviously shove turn.

To the OP:
I like helping people, so let me try and help you with a little blanket advice based on the hands that you've been posting.

Don't be thinking of what your opponent has that you lose to all of the time. In your other post you're like "does this feel like aces?" when the fact of the matter is, so what? Even if it does feel like aces, it might be queens, or jacks or tens, and since you're not folding here, ever, with your stacks, doesn't make much of a difference what he actually has. If he has aces, then you got unlucky that you ran into a cooler. This hand is no different here. You have a hand that is simply too strong NOT to put all of your chips into the pot, so you don't even need to worry about the villain's hand too much.

You should be thinking "what does my opponent have here" and not "what does my opponent have that I can't beat here" when you're in a hand. Don't be afraid of monsters that aren't there. If your hand was big enough to put your stack into the pot then it's unfortunate that your opponent turned up with a better hand, but it doesn't mean that you made a mistake by putting your chips in there. I mean, according to Sklansky you did, but the real world doesn't work like that.

Yup. People at this level aren't that readable most of the time and can show up with lots of hands you can't even imagine.

Sorry, but I'm not sure I'm capable of that. I could almost stand to do this if I didn't play on Jokerstars

No, but seriously, I know what you're saying, I guess I just have a very negative outlook about what my opponent could have when I play poker I suppose.

Scared poker is not profitable poker. If you even think about folding hands like these, make sure you don't show your opponents.
Like Acid said, you can't assume you're beat when you flop or make a good hand.

You really shouldn't play poker if you're afraid of monsters. I really mean that. If you're afraid constantly that you're beaten, you'll never beat a game that you sit at.