I have a fuckin' excellent drug dealer. He isn't always on time, but he usually lets me know if he's gonna be late.
I have it from several sources and shopping around a bit personally that he's usually got the best quality. His prices are very fair, he's very straight-up, doesn't exaggerate doses and tells you exactly what's in it if he knows. He gives freebies quite often, as well. He will always have cannabis, speed, and MDMA, and occasionally gets other stuff. He can be asked for certain things, and if he thinks it's possible or knows someone, you'll probably get it in a couple of days. Once when buying oxycodone, I got the 5mg pills. I hadn't specified which strength I wanted, and they were cheap, but he immediately went back to the guy and came back with stronger ones - and only a slight tad more expensive.
He's also a good friend, so I'll kick it with him and go to his place or invite him over, even when it isn't business. He's also responsible and looks out for me (although I mostly know what is and isn't safe), and is apprehensive about selling large amounts of either highly addictive or OD-liable drugs. Once he randomly dropped over cause he was passing by and brought me a big piece of spacecake. "Hey man, I was just in the neighborhood and thought I'd bring you a piece of cake. I just made it this morning."
He also does other thoughtful shit like acquires stuff his other customers don't like (or he doesn't feel comfortable giving them to), such as opiates or benzos, and then pops up going "Hey, you liked this stuff, right?"