Here are the main reasons I'll reject people's follow requests:
They don't interact with me on a regular basis
If I've never seen them respond to one of my questions, share an opinion on a poll etc., I don't see a point why I should accept their follow request.
They're XPER 1
I'd like to have more interaction with my questions, and if someone is brandnew to this site, it doesn't make sense to let them follow you because they're likely to realise that this site is fairly toxic and just drop our entirely. No dead accounts follow me.
They mainly follow female accounts
I don't want to be another number. It's weird when people follow significantly more pink accounts than blue ones.
They have weird, cringey or creepy usernames
Seld-explanatory. If they'e particularly helpful, I'll let them follow me, but some are just weird and don't do anything to help people out either.
They are consistently unhelpful, hurtful, offensive, shallow or insulting
I think this one is quite clear. Why would I let someone like that follow me?
The bottom line
I put a lot of thought into the things I write on here, I want to be helpful, share my opinions but also support them with evidence. To me, this is a way to enhance my English skills, too - and I can share my deeper thoughts.
What makes you reject someone's follow request?