This is highly inaccurate because it only takes into account a part of the playerbase on any given realm, but it is going to give you a sense on what is a large and what is a little realm. In addition to gold wow classic that, RP lands, barring Argent Dawn, are in my experience usually more friendly than non-RP realms.
I truly appreciate this comment, thank you. Having a look. I would much prefer a more compact pop and better experience to a huge pop and awful experience. I am unsure how it's in EU since im in NA but the RP and RPvP realms tend to have far better communities, even in the event that you don't intend on RPing. Some of my buddies insisted on playing on Illidan for BFA since thats the realm all the big pve guilds and competitive WOW players are around. After a few weeks I needed to move back into ED, a community just makes WOW Classic 1000x better.
As for guilds, don't bother linking the ones spam encouraging or always spamming in exchange with almost 1k members because yea that is all you will get those that aren't actually looking for a guild but just need a bit of a network. If you check on the forums or wowprogress or even on here you can still find guilds that are a fantastic community. Discovering the proper host and community is what makes WOW Classic click and eventually become really amazing, don't let the negativity in some places allow you to give up!
I don't know if I agree. My experience with retail communities generally is non existent. No one speaks unless they have to. Individuals are only interested in themselves. You make one mistake on cheap classic wow gold an alt at 10 key? Youre trash and ought to eliminate WoW. And that is coming from somebody who contributes mythic+ communities. As people have indicated here I've been part of numerous kinds of content.