What are some habits/ traits that you wouldn’t mind in a friend but wouldn’t like in a romantic partner?

pretty much what I said in the title lol. it’s just that I’m on the fence about dating a guy but there are some things he’s said that have given me the ick?!

but I recently got to overthinking that maybe I’m overanalysing stuff with this guy and some of my guy friends also have certain opinions or habits I don’t like but that’s never made me question our friendship …. and then I spent all of last night half asleep and going through every friendship or interaction I’ve had in life ://. I’m just so confused rn.

I would just like to add that I think he’s a nice guy but we’re really different from each other? and I liked that at first because I don’t think I would like to be in a relationship with someone who’s a lot like me lol but now I think we’re too poles apart?