Which, if any, of these bluffs are good ones?

[iceman5]

Here are a few bluffs Ive run the past few days. Whihc of these are good and which suck?

Im getting nothing and have been folding most everything so Im sure I look rockish if any one is paying attention.

1) Live $2/$5 game. Couple limpers and I limp KJ.
Pot $25. Flop 973. Checked to me and I bet $25. Button calls. We are both deep ($1000ish)

Pot $75. Turn 7. I bet $75...Good? Bad?

2) $2/$5 Live.... UTG raises to $25. I call with 44. He has $300 and I have him covered.
Pot $55. Flop KK3. He bets $50 and I call.
Pot $155. Turn J. He bets $30 and I make it $130. Good? Bad?

3) Online..$1/$2 NL 6 max....UTG raises $6. I call with 66. 2 other callers.

Pot $24. Flop 983. UTG check, I check, button bets $10. Folded back to me and I check raise to $40. He calls.

Pot $104. Turn 2. I bet $75....Good? Bad?