Typical semi-loose passive villain from what I've seen so far.

Party Poker No-Limit Hold'em, $ BB (9 handed) from (Format: Bet The Pot)

UTG ($113.80)
UTG+1 ($66.92)
MP1 ($20)
Hero ($135.38)
MP3 ($49.28)
CO ($120.10)
Button ($51.21)
SB ($54.56)
BB ($99)

Preflop: Hero is MP2 with , . MP1 posts a blind of $1. SB posts a blind of $0.50.
2 folds, MP1 (poster) checks, Hero calls $1, MP3 calls $1, CO calls $1, 2 folds, BB checks.

Flop: ($5.50) , , (5 players)
BB checks, MP1 checks, Hero checks, MP3 checks, CO checks.

Turn: ($5.50) (5 players)
BB checks, MP1 checks, Hero bets $4, MP3 raises to $8, CO folds, BB folds, MP1 folds, Hero raises to $18, MP3 calls $10.

River: ($41.50) (2 players)
Hero bets $31, MP3 calls $30.28 (All-In).

Final Pot: $102.78

I'm thinking I could have raised more on the turn since he clearly likes his hand a lot. Since I didn't, and he only called my re-raise, I hated the river. His min-raise on the turn probably meant two-pair or a set, he's a semi-loose player (loves AX), and now the river pairs the aces.

I didn't know what else to do on that river. C/F the straight on the river? Block bet? C/C any bet? Of course I just stupidly shoved my money in. There really weren't many hands I beat given this action. If I did this analysis during the hand, I probably would have check-called a small bet and check-folded to anything bigger.

You should have re-raised pot on turn i.e. raise to 28, thenn it is easy to play any river, just shove it=). As played, I think check call is probably better, or check fold depending on how much he would bet.