Lost opportunities?

[suited_ace]

Taking a look at my HHs I found a lot of hands like these. Are these all pushes? If not, why wouldn't you push?

1.
Party Poker No-Limit Hold'em Tourney, Big Blind is t100 (5 handed) converter

BB (t1395)
UTG (t2835)
MP (t1850)
Hero (t830)
SB (t1090)

Preflop: Hero is Button with 4/images/graemlins/spade.gif, K/images/graemlins/spade.gif.
3 folds, SB raises to t300, 1 fold.

Final Pot: t400

2.
Party Poker No-Limit Hold'em Tourney, Big Blind is t100 (5 handed) converter

SB (t2555)
BB (t2575)
UTG (t1050)
MP (t1265)
Hero (t555)

Preflop: Hero is Button with 4/images/graemlins/club.gif, K/images/graemlins/diamond.gif.
3 folds, SB completes, BB checks.

Flop: (t200) Ts, 8d, Qs (2 players)
SB checks, BB bets t100, SB folds.

Final Pot: t300

3. I don't like the shortstack in the SB, but...

Party Poker No-Limit Hold'em Tourney, Big Blind is t100 (7 handed) converter

UTG (t1510)
MP1 (t1140)
MP2 (t1235)
CO (t600)
Hero (t535)
SB (t290)
BB (t2690)

Preflop: Hero is Button with K/images/graemlins/spade.gif, 8/images/graemlins/club.gif.
6 folds.

Final Pot: t150

4.
Party Poker No-Limit Hold'em Tourney, Big Blind is t100 (5 handed) converter

BB (t1720)
UTG (t875)
MP (t2595)
Button (t1925)
Hero (t885)

Preflop: Hero is SB with 8/images/graemlins/heart.gif, K/images/graemlins/heart.gif.
4 folds.

Final Pot: t150

[TStokes]

I would push every one of these hands.

[kyro]

The first one is close. Not quite sure. The last 3 are all pushes.