Please critique this play of AA

[Student Caine]

Thanks for all of your help with my AKo post...so now how about this play of AA, which has been a feast or famine hand for me as well (in fact, in the past I have done better with AA by shoving preflop!).

Thanks in advance for your input.

Ultimate Bet No-Limit Hold'em, $1 BB (10 handed) converter

saw flop|<font color="#C00000">saw showdown</font>

MP2 ($97.25)
MP3 ($96)
CO ($138.10)
Button ($131.30)
SB ($97)
BB ($99)
<font color="#C00000">UTG ($210.20)</font>
UTG+1 ($32.35)
UTG+2 ($70.55)
<font color="#C00000">Hero ($98.50)</font>

Preflop: Hero is MP1 with A[img]/images/graemlins/spade.gif[/img], A[img]/images/graemlins/diamond.gif[/img].
UTG calls $1, UTG+1 calls $1, <font color="#666666">1 fold</font>, <font color="#CC3333">Hero raises to $5.5</font>, MP2 calls $5.50, <font color="#666666">5 folds</font>, UTG calls $4.50, UTG+1 folds.

Flop: ($19) K[img]/images/graemlins/club.gif[/img], Q[img]/images/graemlins/spade.gif[/img], 8[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(3 players)</font>
UTG checks, <font color="#CC3333">Hero bets $15</font>, MP2 folds, <font color="#CC3333">UTG raises to $30</font>, <font color="#CC3333">Hero raises to $45</font>, UTG calls $15.

Turn: ($109) 4[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
UTG checks, <font color="#CC3333">Hero bets $48 (All-In)</font>, UTG calls $48.

River: ($205) 9[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players, 1 all-in)</font>

Final Pot: $205

Results in white below: <font color="#FFFFFF">
UTG has 8h 8c (three of a kind, eights).
Hero has As Ad (one pair, aces).
Outcome: UTG wins $205. </font>