Well my first act of rebellion was to attend an office Christmas party at the age of 21 where I proceeded to get smashed off my butt on champagne, dance all night, & had to be carried up the stairs to my apartment by my co workers. Best night of my life!!! That's the act that got me disfellowshipped, and 3 elders told me "the charge is public drunkeness" LOL
Since then my favorite act of rebellion is to take care of my sexual needs myself on occasion with no guilt, only pleasure. It's so natural, it's very silly how religions make such a big deal out of it.