Villain is 44/17 over a small sample but seems a little donkish. Shown he is willing to gamble by previously calling a nits pre-flop all in with 44.

Titan Poker 0.50/1.00

saw flop | saw showdown

Button ($100.00)
SB ($69.30)
BB BB ($104.35)
Hero UTG ($100.50)
UTG+1 ($42.65)
CO ($131.15)

Preflop: , UTG raises to 4.00, 4 folds, BB calls 3.00.

Flop (8.50)
BB checks, Hero bets 6.00, BB raises to 18.00, Hero calls 12.00.

Turn (44.50)
BB bets 24.00, Hero calls 24.00.

River (92.50)
BB moves all-in for 58.35, Hero?