No.
I only accept friend requests from people I know IRL, and even then I make sure it's actually them.

Never accept random invites.
They tend to come from scammers hoping to trick you into giving away your inventory.
Or they are someone who can't really afford most games and are hoping to beg for you to gift them one.

Not a one and that will never change. People on steam are super weird.

The reasons I accept or deny people on my friends list is something you'll just have to take your best guess at, mr dataminer.

Sometimes. I usually take a look at their profile and post history and if they were active in a topic i recently posted in then i usually accept and wait for them to contact me.
In 95% of cases its someone who has a question about a certain Steam function like Family Share or regional restrictions and i dont mind helping people out. I was very active on the forums the last 13 years and i try to help when i can so naturally its mostly those users who add me.
I honestly never have been added by a scammer in my 13 years on Steam. Of course i dont play multiplayer games like CSGO 2 or similar, my inventory is pretty much devoid of anything valuable and i am not a member of any trading groups. So i am not really a target of those out to scam.

Rarely, it really depends on their profile.

If we have friends in common, usually i will.
If we share the same game and have a lot of hours? sometimes i will.

If neither and you have a human woman as your PFP, you're likely a TF2 or CS:GO bot trying to scam me.
Unless they play REPO or Phasmophobia, then they are probably a real woman.

i pretty much have a rule that is if i don't know you from anywhere, will reject the request, if you have a ban i'll block you. if i jammed games with you or chatted with you on a forum then we can be friends.

Depends on their profile.

It depends, if we play the same games or I have played alongside them in a previous game, I'll consider it. If it looks like it's a random invite, then no. Anyone with a VAC ban is an instant no.

No. An account's conviction that they "want to be friends" or their ability to reach out, does not entitle them to a space on my friend list. Which is exactly that. My friends list isn't a charity and it isn't open to every whoever who finds my profile.

If they play the same games as I do then yes, if not &/or their profile doesn’t have much information then no.

I never accept any invites and most of the time I block people too. I'm here to play games, not to socialize with complete strangers. Anyone who gets between me and video games is an obstacle.

Not in a million years.

Only if she is extremely hot and real.

No