Ya know, I don't keep up with the rap world. The only "diddy" songs I know are a song from the 1998 Godzilla soundtrack, which uses a Led Zepplin sampled song as the basis for the song, and a collaboration with Lincoln Park where he uses a their entire song, with him replacing their lyrics with his own in which he calls all women bitches.
So my view of him from my vantage point is that he's unoriginal, and needs other peoples work to survive.
I know even less about 50 cent's music. I don't know a single song. I just know he got famous around 2007 for getting shot 7 times. But any idiot can get shot. Just ask Brett.
That being said, outside of music I know diddy used to host parties in which he needed 10,000 bottles of baby oil.
50 cent on the other hand I've been told got the creeps from diddy, and that led to some confrontation, which left 50 cent with a grudge. Then he said he felt happy taking diddy down, and was happy there were no more parties.
So even though I will probably never listen to a single one of his songs, and even though I can't imagine how or why I'd ever spend money on 50 cent, I can still say I at least respect the fact that he saw diddy as a creep who needed to be taken down. I can respect that. Even if the music isn't for me.