I know this is a bad example, but it made me wondering. I Knew he had the ace and was hoping not with J kicker for the highest boat. I also know that he had the best hand when we put our money in to the middle, so don't whine about it.

The question is, should i normally play more aggressively big hands which aren't THAT big?

Party Poker No-Limit Hold'em, $ BB (9 handed) FTR converter on zerodivide.cx

Button ($122.15)
SB ($52.87)
BB ($120.20)
UTG ($43.40)
UTG+1 ($99)
MP1 ($146.85)
MP2 ($70.70)
Hero ($115.15)
CO ($100)

Preflop: Hero is MP3 with J, J. SB posts a blind of $0.50. CO posts a blind of $1.
2 folds, MP1 raises to $5, 1 fold, Hero calls $5, 4 folds.

Flop: ($12.50) J, A, T (2 players)
MP1 checks, Hero bets $5, MP1 raises to $10, Hero calls $5.

Turn: ($32.50) A (2 players)
MP1 bets $9, Hero calls $9.

River: ($50.50) 6 (2 players)
MP1 bets $15, Hero raises to $40, MP1 raises All-in $107.85, Hero calls All-in $51.15.

Final Pot: $261.50

Results in white below:
MP1 has Ac 6d (full house, aces full of sixes).
Hero has Jd Jh (full house, jacks full of aces).
Outcome: MP1 wins $261.50.