I met a guy briefly in class as part of a group project. Immediately off the bat I started being a little feisty with the guy (for real reason, just my personality). Another guy in the group started laughing and kept saying "I just love this." So, did he just like it because he found it funny or is it possible that it's a turn-on? Because he was smiling at me the whole time.
I think some guys like it when a girl is a little feisty if it comes across as a bit humorous, comfortable and confident. I've seen some that get combative and there is no good in that, feisty yes, combative no.