WORST: A jerk I used to play with who refused to play D&D unless his characters were ridiculously overpowered. If pressed, he would play "underpowered" characters, but he'd whine and fume about it the whole game. Somehow, he was able to convince several DMs to tolerate his shenanigans. His favorite character of all time has been an age category 12 gold dragon with 56 ninja levels (this was back in mid-2E days), when the rest of the party was between 10th-12th level. He also could not make a character without either basing it off a video game or having a DM hand him a pre-gen character. And the icing on the cake was when he'd oh-so-subtly veil threats to the other players by casually discussing how his character could beat their character's asses whenever he wanted and the characters are lucky he's on their side. He'd also physically threaten other players from time to time, but nobody took him seriously because this cat was something like 400 pounds and literally waddled from time to time. The straw that broke the camel's back for me even being on speaking terms with this social retard was when he joined a vampire LARP game and started stalking some of the female gamers (and talking about killing their boyfriends and entire families and carrying swords around in public under his trenchcoat). The only reason that the LARP group didn't lynch and kill him for what he was doing is because me and some other players convinced them that everybody would blame the vampire game instead of his the issues and all that, and it'd be just a huge bad PR thing for gaming in general. To this day, I don't know if that entire debacle was because it was the only time he'd ever been able to actually speak to reasonably attractive women at all or because he couldn't seperate fantasy from reality too well. But I don't want to know bad enough to look him up and ask him. 
BEST: The best player was easily Paul, a marine who I met through accessdenied.net. Whenever we'd game at his place, he'd make fantastic feasts: stuff like rotisserie chicken, freshly baked desserts, homemade chili, grilled steaks, you name it. He was an excellent cook with an extremely well-stocked and well-equipped kitchen, people were asking him for recipes and lessons all the time. He always fed the group extremely well, and with food that I'd easily expect to pay upwards of $50 at a restaurant. This cat could COOK! His food sure beat the pizza I'd occasionally pick up or the KFC someone else would bring. Not only was he an excellent host, but as a gamer he'd always want to pick up the slack at the table. When the group didn't have a cleric he volunteered without a second thought, sacrificed his own XP to make magic items for the group, and otherwise took the hero role seriously. When the characters captured a ruined castle, he volunteered to take the rough maps that I'd sketched out and the Stronghold Builder's Guidebook and finish the whole thing so the group could retire in style. An all-around class act, not just as a player, but as a person.
BEST: The best player was easily Paul, a marine who I met through accessdenied.net. Whenever we'd game at his place, he'd make fantastic feasts: stuff like rotisserie chicken, freshly baked desserts, homemade chili, grilled steaks, you name it. He was an excellent cook with an extremely well-stocked and well-equipped kitchen, people were asking him for recipes and lessons all the time. He always fed the group extremely well, and with food that I'd easily expect to pay upwards of $50 at a restaurant. This cat could COOK! His food sure beat the pizza I'd occasionally pick up or the KFC someone else would bring. Not only was he an excellent host, but as a gamer he'd always want to pick up the slack at the table. When the group didn't have a cleric he volunteered without a second thought, sacrificed his own XP to make magic items for the group, and otherwise took the hero role seriously. When the characters captured a ruined castle, he volunteered to take the rough maps that I'd sketched out and the Stronghold Builder's Guidebook and finish the whole thing so the group could retire in style. An all-around class act, not just as a player, but as a person.
. To make matters worse, he was over 6 feet tall, probably close to 300 pounds, and wanted to wrestle the other players on the front lawn all the time.
