Hello Rotwave
I am also a returning player. I came back in March. Apparently it had been 7 years since I was last online! I have really enjoyed WoW since then but one of the things I was missing was the social aspect of a Guild. I joined a guild for this xpac that I am quite happy with at Tryhardish.
There is a wide variety of experience levels that lead to a more casual atmosphere. But, the officer team is knowledgeable and skilled while being dedicated to forming a positive environment. Avg age is probably in the 30s with a ton of working adults that want to game. Im 41.
We currently are looking to fill out a raid team. Although anyone is open for an invite for M+ or other activities. The raid schedule is at 10-12 est Thursday and Saturday.
If that sounds like it might be a good fit for you, I invite you to check them out. Cheers,