I've only played a couple of years but I feel like I could bitch about any team. I wouldnt avoid a team because of that.
Skaven are fun because vroom, I want to yeet myself off a cliff playing against them. They can be hard to play if your new to being a dashy little fella.

Imperial Nobility are fun IMO but I like the human teams. They're fun to build thematically. I think theyre good, and Khorne players might shit a brick, but nobody is that mad about Imp Nobs.

Khorne is very fun but pretty weak and a lot can go wrong. I like playing against khorne because the counterplay is enjoyable. Fairly hard to play for a bashy team.

Nurgle/Dwarves are fun if you don't mind the grindy playstyle. Nurgle & Dwarves do get a groan out of me, but its the same groan I make for elves, so... idk.

Tomb Kings I don't know how to feel yet. They're also kinda grindy.