Hmm, I've had very people that I've come across in my life that I've seen as an enemy, let alone strongly dislike and one that was borderline "hate."
The first guy was this kid in secondary school who used to bully me for random things, looking back on it he was a total idiot and attention whore. He didn't have friends but harassing me seemed to be his only joy in school. Anyway one day I couldn't take it anymore, after like weeks of ignoring him and telling him to back off I get physical with him but just like to let him get the message loud and clear. Since then he never bothered me again throughout the rest of our time in school. Ironically, there came a point when he left school but I stayed for the other two years to finish certain exams and I happened to be in the office the day he came back for his transcripts. He apologized to me and we talked like normal people. That kind of gave me hope that maybe some idiots just need to grow up and they won't be that bad.
The next guy, I mentioned before on here a few times I believe. He was cool with me in school but when he left, lost a ton of weight, got buff and started to go to parties (his brother's wishes, he never seemed to be into that before); he instantly becomes an asshole. Acting like he's above other people now, when he used to get taunted for his weight and how he looked in the past. Only thing that really got me pissed off with him is that when I called him out on it, he's like that was the old him and this is who he really is... blah blah gay insult (doesn't know I'm gay but it's common to use that type of thing here) blah blah. I don't have to be around this guy anyway so don't care that much.
In culinary school, there was this one guy... man he was a case. In the first semester, he was apparently popular with everyone. So he randomly adds me on facebook, because the 'popular' people used to make fun of me or something behind my back for liking musicals/glee etc. (the usual) and I assumed he was up to something. He starts to talk to me and I'm with my guard up, eventually he just flat out asks me "so how many guys did you sleep with during the vacation?" I just replied "FUCK YOU" and unfriended him. Now this is kind of the funny part, the "karma is a bitch" part really. The second semester, somehow, people started to really warm up to me and I mean they really were interested in me and liked me. Everyone did, especially the popular people. It started when I stood up for something that no one wanted to, and after that I guess I got their respect and they wanted to get to know me more. Well that asshole who harassed me on facebook was disowned by everyone, apparently he did something like hit a girl or something crazy like that. I decided this was an adequate time to input my story too. Turns out they were supportive of me in the situation I told them and disliked him more. Oddly enough, he tried to honestly become friends with me like a year later because no one would even talk to him. I felt bad for him, because I know what it's like, so I tried to put what he did behind me and talk to him. Low and behold, he's an obnoxious and self-centered person even when I gave him a chance. When I told him that, he got furious with me. I simply told him that he's never going to get friends acting like that and we haven't spoke since...
Finally, the guy that I hate (or borderline at least)... this guy is just the most vile creature I've ever laid my eyes on. All throughout secondary school, this guy would insult me, call me names and make fun of me. For no reason whatsoever. He was never in the same class with me, so it'd be like whenever he'd see me around he'd just let one off. It never bothered me much because I just assumed he didn't like me for some reason and it wasn't very often so it was no big deal since he was rather insignificant in my life. There were two points that solidified that this guy was just pure garbage. The first was when he broke his foot or something playing football (soccer for Americans) and I happened to be staying back in school late and saw him there. Apparently his parents are rich and he had to wait like 2 hours for them to come pick him up, he'd have been there alone in his cast and whatnot. Without his prompting, I asked my mom to drop him to his house. In the car, he acts all friendly and nice to my mom not really acknowledging me. The next day at school he insults me for being so nice and my mom, I got pissed off but my friends cooled me down to not do anything stupid. The next point was a few years later, after he left school but I stayed for Form 6. He was visiting the school to see old friends, I actually wave at him and say 'hey' along with another friend of mine (a guy that was friends with everyone) and he goes off saying stuff like "Hey faggot. I don't want a fag talking to me" and said that that applied to my friend also. This was after the first guy I mentioned, so I thought "well maybe he changed" but he didn't. I'm just glad I never have to see this jackass again.
Sorry for the long post, but this was actually quite a relieving way of dumping some old baggage so thank you Coach!