Haven't played in 10 years. Is it worth coming back? And what server should i do? any to avoid cause of bots etc/

Come play nightslayer classic anniv

I’d avoid retail if you want to play for the first time in 10 years.
Kiss suggested Classic anniversary (1-60 classic restart realm)
Mists of Pandaria classic just came out last week so it’s rather fresh. You can get a 85 boost with a cool sha ground mount tiger and an okay looking sha cloid serpent for $85 or something.
First Raid just started on Thursday

Why avoid retail? Am I too far lost from what the game is now?

I wouldn’t say that but alot has changed since then (i’m not much of a retail guy besides mythic plus dungeons). The game is a far cry from what it was in Wrath of the Lich King.

Hmmm, yeah i would a casual player at best. Thank you for the info, I appreaciate it. Shame the game has gone down hill

Retail is better for casual. You can hop on and queue play a couple dungeons and get off. Classic and to some degree mop classic are a little more time intensive. Classic especially hardcore classic has an overall better solo experience, but group stuff can take a lot of time and commitment.