I hate being patronised
It bothered me more when I got it from other kids at school because they thought I was thick (I never answered even simple questions when asked and things like that, even though I knew the answers)
Being treated like I'm stupid by people who I'm likely more intelligent than pisses me off the most
I can understand why most people tend to treat me like a child sometimes, as I can be pretty immature, and emotionally I am more like a 13 year old apparently
I don't think that is true though, but I am quite naive in ways other people my age seem to have grown out of. Maybe that's why people treat me younger than I am. I figure they'll stop eventually though so it doesn't bother me too much.