how to categorize your opponent

Villian unknown - small winner on TR like 2.4k or something silly. We've been playing maybe 15 hands, I 3 bet twice and he folded, he 3 bet twice, once I folded the flop and this time I didn't want to for obv. reasons.... most people that play me know that I hate folding and I'm a huge calling station but i follow guide from headsup-pokerstrategy.C0M , and that make the difference. what do you think?

Poker Stars $2/$4 No Limit Hold'em - 2 players - View hand 183497
Hand History Converter

BB: $397.05
Hero (BTN/SB): $450.00

Pre Flop: ($6.00) Hero is BTN/SB with K T
Hero raises to $12, BB raises to $36, Hero calls $24

Flop: ($72.00) 5 K A (2 players)
BB bets $56, Hero calls $56

Turn: ($184.00) 2 (2 players)
BB checks, Hero checks

River: ($184.00) T (2 players)
BB bets $305.05 all in, Hero

What worse hands shove here?

AA, KK, TT, AK, AT, 35 and QJ is likely here, and I dont see hands like AQ, AJ, A9, KQ shoving.

Only hands I put in his bluffin range is 23s, 45s and maybe JTs. His timing on flop bet and turn check is important.

What are the suits like in this spot? If it's completely rainbow then AA/KK/AK are a possibility (12 combos) but not likely as bet/bet/bet would be standard given you're probably never folding Ax anyway. He's basically repping only QJ and it is a possibility that he has it here. Of all the possible calling hands we could have in this spot we have the very bottom of our range so I don't mind folding.

Thinly veiled spam attempt?

try to guess there bet sizes when your not in the hand to get a gd read on them