i've never really felt bullied - a victim of cliquey girls and arrogant guys, sure, but never really targeted. i was teased for a few things, mainly physical, but i feel like mostly the teasing was due to general resentment at me for being top of my class. i suspect it never became that bad because i loved being an overacheiver - like, the teasing never made me stop doing well. plus some people eventually figured out that it was much more effective to just befriend me and ask favors, lol. i also never wanted to show that i was being affected - prideful denial, i guess. the teasing did combine with general anxiety and low self-esteem, which all led to me developing a (very secretive) eating disorder. yuck.
i also had some decent ways of getting back. for example, one boy decided it would be a good idea to cheat off me for a quiz. i observed him doing this, and the subsequent class, i purposefully let him do it again, but this time, listing incorrect answers. i waited for him to turn his in, then erased all my fake answers and filled my real ones in. i also have always had a fairly good read on people's more sensitive places and have little trouble hitting below the belt if i'm really pissed off. (edit -) not that i think that the bullied person needs to or even can stop the bullying - just saying i can be kind of an asshole sometimes and i'm sure that's kind of offputting to a bully when choosing victims.
as for being a bully, i don't think i've ever bullied anyone. like i said, i have a good read on people, and if i'm in a bad mood, or if i've just been pushed way out of my tolerance limits, i have the unfortunate ability to really hurt people psychologically. but rarely - i would say never - have i done that without someone else provoking me first.
overall i tended to treat the bullies with sarcastic neutrality and tended to befriend victims, which i suppose led to being a generally neutral party. nowadays, i have more self-confidence and less patience. i usually still tend to navigate "around" people but i take real pride in telling certain jerks exactly where they can stick it.
i do not think that there is any such thing as being "above" bullying though. maybe a person has good social skills for avoiding it, but it is not due to a moral highground.