Donk or Standard? Really tough spot for me.

[xtwalker]

I don't know what most stacks at the table are at this point, but opening in early possition for that much with a KJ is, lets say aggressive... You are throwing nearly 10% of your stack out with plenty of action behind you, and you are looking for some pretty tailored flops for that hand. In other words, you are usually only called by hands that you are behind, and will likely play OOP.

C-bet is good, but too low for me. I would throw out a $90 bet to try to take it down right there, get the weak made hands out.

Now ask yourself what could he be C/R'ing with. Could be as little as TPGK, Nut flush draw, more likely two pair, possibly a combo-draw.

Interesting spot, and you aren't priced out of a call, but you are certainly playing catchup. That means the push is probably extreme for the situation.

BTW, you had $75 invested, not $100 ($30 PF and $45 flop) that means you had about $265 back. Changes the math of the situation ever-so-slightly.