The type of people that drive me crazy are:
"The funny guy / girl". He / she confidently thinks he / she is hilarious, and cannot be serious about anything. Every comment is a self-perceived funny comment, except nobody but him- or herself find him / her funny. These kind of people are so obnoxious and tiresome.
The insecure "funny guy / girl". This person is like the regular "funny guy / girl", but without the confidence. So when they make their "funny" comments, they always end their sentence with "just kidding" or "just joking". Still extremely obnoxious and tiresome. And if you have to let people know when you are trying to be funny...it means you are NOT funny! Just stop it!
Loud and attention-seeking people. They also tend to talk too much, and don't allow anyone else a chance to speak. If, by miracle, someone DOES get to speak, these sort of annoying people show zero interest and usually end up interrupting the person speaking. Infuriating.
"The victim". The kind of person who thrives on attention, sympathy and pity from other people by constantly oversharing / telling them about their sad, sad and hard, hard life. In very great detail. Even people they don't even know. They are inappropriate, lack boundaries, make people uncomfortable, and they somehow think the whole world is interested in hearing about how hard, sad and tough their life is. Get over yourself. We all have a hard life.
Oversharers in general. If I'm not your close friend or family, sorry, I don't want to hear about your abusive exes, your mental health problems, your child's ADHD, your sex or love life, or anything else that's super personal. Some things are reserved for close family and friends only, not colleagues, random strangers or acquaintances.
People who lack social awareness and consideration for others. Like people who take their shoes off at the cinema and plonk their stinky, rotten, disgusting, crusty feet on the empty chair in front of them. Just gross, vulgar and inconsiderate. Same goes for speaking during films at the cinema, jumping queues, tailgating other drivers, etc.
Young girls / teenage girls who scream giggle in public for no reason. Just, why? It's annoying as hell, and so unnecessary. Same goes for young men / teenage boys who yell laugh in public for no reason. Very strange behaviour.
There are more, but I can't think of them right now.