Here's my rule: if you make music that sounds great, you obviously don't suck. Because the name of the game is to make good music. You only suck when you can't make good music. e.g. Dave East. Dave East sucks. He's several levels below 21 Savage.

Dude's vocal delivery is completely different from everyone else. In fact, that's why Coli posters hated. They have a habit of hating on anything that sounds different that isn't immediately cookie-cutter. Something that requires a deeper listen to understand.
That bassy, semi-bored, sarcastic world-weary, I'm in a haze and just woke up vocal tone was completely different. It's like film noir shyt. Metro was obviously inspired and reached into his bag to make his best production ever on Savage Mode, which itself is some eerie film noir shyt.

cmon breh. Where'd you pull this out of? They sound nothing alike, from vocals to production. While you're at it, why not mention Biz Markie?