Is it normal to think about oneself as 'we'

I do sometimes, it's just something in me.

Only if you're a monarch or pope.

https://en.wikipedia.org/wiki/Royal_we

I'd call it normal.

I sometimes run conversations in my head as if I was talking to someone, usually in plural, asking for advice or just talking 'bout my day.

I think a lot of people do it. No worries.

Depending on the frequency, I think it's normal.

I do it sometimes, not all the time. Especially if I'm going somewhere, or want to put emphasis on a thought, I'll think "we're going to do this" or "we're going to go there". The rest of the time I just use "I".

No, not really. You are not plural.

I have a tendency to say "We need xyz" etc when I have a kid with me. I probably sound like a tool using the royal "we" to the people I talk to. I'm trying to be conscious of not doing it so I don't look like a pretentious git.

It's normal. Don't trust us.

Yes it's normal but be careful, your significant other might think you're cheating when you tell him/her "we" are doing stuff without you.

It's normal, although you do it a lot. I do that when talking or thinking to myself, like, "Let's do this", and "We're going to do this or that."

Sounds sort of stupid at best, and crazy at worst. You are only one person.

Lowkey sounds like you just watched Venom too many times

Common among serial killers and psychopaths.

It's improper, sort of like; "all your base are belong to us"