Interesting 15/30 Hand

I'm going to start posting more hands here so as to not waste so much space elsewhere. Here's the hand and my analysis for it:

Full Tilt Poker Game #452558929: Table Pacific Harbors - $15/$30 - Limit Hold'em - 20:06:29 ET - 2006/02/20
Seat 1: XA_kid ($1,201)
Seat 4: bagel2 ($502), is sitting out
Seat 5: DRUNKGOOSE ($703.50)
Seat 6: notsniw ($506)
Seat 7: slopoker805 ($300)
DRUNKGOOSE posts the small blind of $10
notsniw posts the big blind of $15
The button is in seat #1
*** HOLE CARDS ***
Dealt to XA_kid [4h 4s]
XA_kid raises to $30
DRUNKGOOSE folds
notsniw calls $15
*** FLOP *** [Kd 8d Jd]
notsniw checks
XA_kid checks
*** TURN *** [Kd 8d Jd] [Jh]
notsniw checks
XA_kid bets $30
notsniw raises to $60
XA_kid calls $30
*** RIVER *** [Kd 8d Jd Jh] [9h]
notsniw bets $30
XA_kid calls $30
*** SHOW DOWN ***
notsniw shows [6d Qs] (a pair of Jacks)
XA_kid shows [4h 4s] (two pair, Jacks and Fours)
XA_kid wins the pot ($249) with two pair, Jacks and Fours
*** SUMMARY ***
Total pot $250 | Rake $1
Board: [Kd 8d Jd Jh 9h]
Seat 1: XA_kid (button) showed [4h 4s] and won ($249) with two pair, Jacks and Fours
Seat 4: bagel2 is sitting out
Seat 5: DRUNKGOOSE (small blind) folded before the Flop
Seat 6: notsniw (big blind) showed [6d Qs] and lost with a pair of Jacks
Seat 7: slopoker805 is sitting out

Preflop: Nothing Special Here.

Flop: This guy has been very aggresive and would check-raise me with a draw. I don't want to be faced with a tough decision, so I checked to see what he did on the turn

Turn: A blank hits in the form of pairing the board. He checked to me and I bet, confident I was ahead. When he raised me, I went over the possibilities in my head: A King? No he would've reraised me preflop. A Jack? Well, they are two on the board, so he would've needed two in the deck. I also think he would've bet out here with a King or Jack. An 8 he would not've played this hard. So it's either a made flush or a flush draw. I decided that his play was strange enough that I put him on a semi-bluff. No diamond on the river meant I was calling.

River: No diamond, I win.

The big thing that tipped me off was that he played this hand very differently than he usually does. Something didn't smell right here and I called him on the bluff.

The lesson here? If you are bluffing, make sure your bluff is consistent with the rest of your play or warning bells will go off in other player's heads.