Thoughts Welcome

Okay I play mainly low buy in tournaments for enjoyment. I manage to win enough to keep me in buy ins but nothing spectacular.
I am still learning and would really like to know you might have played this hand different. Two hands in a row I get dealt KK the first one was simple caught a king on the flop and extracted as much as I thinki I could of off the other player. The second one was not so simple and I ended up losing a little.Please tell me what you might have done different. I thought maybe I should have reraised another time I thought about it believe me. I was against a player who could have eliminated me and I hate shoving with KK without seeing a flop.
anyways obviously I played it wrong.

Hand#28129FC3F5000394 - $0.25 NL Hold'em - R&A T10470389 -- CASH -- $0.25 + $0.1 -- 10 Max -- Table 1 -- 150/800/1600 NL Hold'em -- 2011/12/17 - 00:26:33
Dealer: Seat 7
Seat 1: drc0ffice (47,215 in chips)
Seat 3: DocHolidday (53,267 in chips)
Seat 4: bullseye (24,950 in chips)
Seat 5: suzyshot (10,355 in chips)
Seat 6: DaLion2010 (29,422 in chips)
Seat 7: TeribleTerry (36,437 in chips)
Seat 9: KR0TRA (19,355 in chips)
Seat 10: bellon23 (95,499 in chips)
drc0ffice: posts ante of 150
DocHolidday: posts ante of 150
bullseye: posts ante of 150
suzyshot: posts ante of 150
DaLion2010: posts ante of 150
TeribleTerry: posts ante of 150
KR0TRA: posts ante of 150
bellon23: posts ante of 150
KR0TRA: posts big blind 1,600
Dealt to DocHolidday [Ks,Kc]
bellon23: folds
drc0ffice: raises to 4,534
DocHolidday: raises to 7,468
bullseye: folds
suzyshot: folds
DaLion2010: folds
TeribleTerry: folds
KR0TRA: folds
drc0ffice: calls 2,934
*** FLOP *** [2h,Jc,Kd]
drc0ffice: bets 1,600
DocHolidday: raises to 11,200
drc0ffice: calls 9,600
*** TURN *** 8♦
drc0ffice: checks
DocHolidday: bets 19,200
drc0ffice: calls 19,200
*** RIVER *** 6♦
drc0ffice: checks
DocHolidday: is all in 15,249
drc0ffice: folds
DocHolidday: returns uncalled bet 15,249
***SHOW DOWN***
DocHolidday: shows [Ks Kc]
DocHolidday wins 78,536


drc0ffice chats: mh
Hand#28129FC3F5000395 - $0.25 NL Hold'em - R&A T10470389 -- CASH -- $0.25 + $0.1 -- 10 Max -- Table 1 -- 150/800/1600 NL Hold'em -- 2011/12/17 - 00:28:05
Dealer: Seat 8
Seat 1: drc0ffice (9,197 in chips)
Seat 3: DocHolidday (93,785 in chips)
Seat 4: bullseye (24,800 in chips)
Seat 5: suzyshot (10,205 in chips)
Seat 6: DaLion2010 (29,272 in chips)
Seat 7: TeribleTerry (36,287 in chips)
Seat 9: KR0TRA (17,605 in chips)
Seat 10: bellon23 (95,349 in chips)
drc0ffice: posts ante of 150
DocHolidday: posts ante of 150
bullseye: posts ante of 150
suzyshot: posts ante of 150
DaLion2010: posts ante of 150
TeribleTerry: posts ante of 150
KR0TRA: posts ante of 150
bellon23: posts ante of 150
KR0TRA: posts small blind 800
bellon23: posts big blind 1,600
Dealt to DocHolidday [Ks,Kd]
drc0ffice chats: nh
drc0ffice: folds
DocHolidday: raises to 6,400
DocHolidday chats: ty
bullseye: calls 6,400
suzyshot: folds
DaLion2010: folds
TeribleTerry: folds
KR0TRA: folds
bellon23: raises to 11,200
DocHolidday: calls 4,800
bullseye: calls 4,800
*** FLOP *** [3c,3s,Ac]
bellon23: checks
DocHolidday: checks
bullseye: is all in 13,450
bellon23: calls 13,450
DocHolidday: folds
bullseye: shows [Kh Qh]
bellon23: shows [Jh Js]
*** TURN *** 6♥
*** RIVER *** 7♠
***SHOW DOWN***
bellon23 wins 62,500 with Two Pairs Jacks and Threes

1st hand: make it at least 12K preflop and never show your hand after he folds

2nd hand: Get it in preflop. Flatting the 3bet is bad, really bad.

Hand 1: I make it at least $10K pre. Alternatively if the table is very squeezy with more stacks in the 15-30K range you can flat to induce a shove over.

When you have KK you want to play as big a pot as possible. Erase the thought that the player who can eliminate you from your mind, your tournament life is worthless. It's a player who can double you up.

Hand 2: Easiest preflop shove ever. This hand illustrates the problem with your thinking. If the guy had more chips he could have either gotten away from it or bluffed you off the hand. When you have KK, the flop is going to be worse for them than for you, so let them put it in before they get scared of the flop.

When you end up with a stack-to-pot ratio of like 1-3 you can be pretty sure you did something wrong.

also include reads, table dynamics and your image when posting HHs.

hand 2. I bump it again pre-flop to at least 25k. I'm happy to get it all in against anything but AA, Assuming the caller doesn't have it, that leaves a 0.5% chance. It can seem tempting to see if an A flops, but that's a defensive attitude that can reduce the value you get when opponents have hands you crush, like QQ or JJ. Plus you're a solid favorite pre- vs an unpaired A anyway

What's already been said in the other responses '&' in Hand 2 you're probably better off to just come over the top & shove (as it'll appear weaker than 4betting to 25k... many will automatically assume > 'AK'.. 'AQs'.).