I've been lucky, as a game master. I've had good players. I had a good group of players when I started running games, and I've continued, with a few minor exceptions, to have good groups since.
I've had players who wrote positively epic character journals. Players who gave their characters family members and mentors and nemeses, not to mention goals that screamed adventure. I've had players who had players who happily moved on to the next idea when I told them no, that combo really is too ridiculous.
And most importantly for me, a GM who improvises a lot of her games, I've had players who come up with dumb ideas and then run with them. Who tell me what they're planning, so I don't have to guess what they're trying to do and can focus on coming up with my own crazy ideas. Who have that perfect mix of confidence, enthusiasm, and crazy inspiration that I will never be able to do without, no matter how good at game mastering I get.
I've had good players. I couldn't have run games that were as fun as they were without them.