How did I do on this one?

[TheWorstPlayer]

CO is 21/2.33/1 tight-passive. Doesn't seem all that good, but pretty tight and pretty passive. BB is the biggest fish I have ever seen. He calls down with any piece of the board and any draw.

Party Poker No-Limit Hold'em, $ BB (6 max, 6 handed) converter

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

<font color="#C00000">CO ($29.9)</font>
Button ($12.65)
<font color="#C00000">Hero ($84.7)</font>
BB ($52.25)
UTG ($20.9)
MP ($58.3)

Preflop: Hero is SB with A[img]/images/graemlins/spade.gif[/img], 8[img]/images/graemlins/heart.gif[/img]. Hero posts a blind of $0.25.
<font color="#666666">2 folds</font>, CO calls $0.50, <font color="#666666">1 fold</font>, <font color="#CC3333">Hero (poster) raises to $2.75</font>, BB calls $2.50, CO calls $2.50.

I was trying to isolate the fish but that didn't work. Was this a questionable move?

Flop: ($9) 4[img]/images/graemlins/heart.gif[/img], A[img]/images/graemlins/diamond.gif[/img], 4[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
Hero checks, BB checks, <font color="#CC3333">CO bets $4</font>, Hero calls $4, BB folds.

I am either way behind a bigger ace or way ahead of a lower pair/no pair so I decide to check/call to give someone a chance to take a stab at it and then I'll see what happens on the turn. Planning on leading the turn and folding to a raise, basically.

Turn: ($17) 4[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">CO bets $6</font>, Hero calls $6.

Now I have a full house, so I assume we are either splitting or I am still way ahead, so I decide there is no harm in check/call to give him another chance to bluff at it and maybe I'll hit my kicker for the bigger boat.

River: ($29) 8[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>

Wow, this never happens. I actually hit my kicker. So I push trying to make it look like a steal the split pot move. Good?

<font color="#CC3333">Hero bets $17</font>, CO calls $16.90 (All-In).

Final Pot: $62.90

Edit: OK, this is actually what I was thinking at the time, but I now realise that it is completely moronic. Obviously my hand is still AA444. Somehow I thought it was AAA44 turning into AAA88. Too late at night. Anyways, please just comment on the rest of it. Particularly comments on the preflop move would be appreciated.