No, it's not a sign he will turn mean. But, if you constantly reject him and fend him off in an aggressive manner he may well take a swipe at you.
In fact, when he's around stay on your feet. If you don't like this type of attention then don't pick him up anymore.
Learn what are aggressive signs, what are herding signs. You must get these things right or you will join the depressingly long list of posters who post, "I used to have such a sweet roo but now he attacks me" and as one might expect the advice is almost always to get rid of the rooster, usually by death and cooking.
Roosters do not dance, not for anyone. They herd and it's harmless. Just walk around him.
Hackle Flashing is a bit bossy. Ignore it.
In fact, read this article. It will explain a little about rooster behaviour and at least you will understand better why they do what they do. Hopefully with this knowledge you will be able to come to a working relationship.
https://www.backyardchickens.com/articles/understanding-your-rooster.75056/