Jacks early....good line or played like a weak tight toddler

I'm a decent ring player trying to convert my thinking into tournament mode. My inclination is to play jacks much more aggro, but was this a better line early in the tourney?

#Game No : 2525216621
***** Hand History for Game 2525216621 *****
NL Texas Hold'em $10 Buy-in + $1 Entry Fee Trny:14787494 Level:1 Blinds(10/15) - Friday, August 12, 22:57:10 EDT 2005
Table Table 35029 (Real Money)
Seat 6 is the button
Total number of players : 8
Seat 1: bigearlwatso ( $755 )
Seat 2: firebarbie ( $785 )
Seat 3: RILEY311311 ( $1080 )
Seat 4: Alexis77 ( $755 )
Seat 5: ontheboatclo ( $835 )
Seat 6: HERO ( $770 )
Seat 9: BumbleBe1298 ( $985 )
Seat 10: jimwhit ( $2035 )

Trny:14787494 Level:1
Blinds(10/15)
** Dealing down cards **
Dealt to HERO [ Jc Jh ]
bigearlwatso folds.
firebarbie folds.
RILEY311311 folds.
Alexis77 folds.
ontheboatclo folds.
HERO calls [15].
BumbleBe1298 calls [5].
jimwhit checks.
** Dealing Flop ** [ 7d, Qh, 3c ]
BumbleBe1298 checks.
jimwhit checks.
HERO bets [30].
BumbleBe1298 folds.
jimwhit calls [30].
** Dealing Turn ** [ Kh ]
jimwhit checks.
HERO checks.
** Dealing River ** [ Tc ]
jimwhit bets [15].
HERO calls [15].


No real reads. The BB made a questionable call against a push to double up, and I my though was I didn't want to lose my stack if he happened to be sitting on a Q or K. Comments on all streets appreciated.