I lived in roseland from 1980 - 2010, and the truth is it's from block to block. It's funny that you bought up yummy, they found his body a block down from mine on 108th where there used to be a pedestrian walkway under the metra/freight tracks. Shavon was supposed to be in my Division at Corliss, we had a moment of silence for her on the first day of school, it was sad.
But anyway my dad still lives off 109th, his block is still beautiful and peaceful filled with homeowners who moved there in the 70's and 80's. Even the elderly whites who were too old to flee stayed until they died in the late 90's and never got messed with. However I personally know 4 people who were killed on the very next block west of us, where there were all apartments and open air drug dealing. That's basically the story of roseland, if you had a good block club, with homeowners who cared it was a good place to raise a kid, if "the element" out numbered the "civilians" then it could be problematic. You just had to be aware of where you were, and where you went, and who you knew as a teenager. Like for instance, I was messing with a girl that lived in "the valley" off 113th and Edbrooke, and the only reason I could even walk over there without getting robbed after sunset was cause I was cool with some of the Blackstones. Or I lived in a GD neighborhood, so my people that were 4's and Moe's from Corliss were super shook to come to my side. But even at the height of the gang wars in the 90's the nice blocks still stayed nice. They did dirt where they knew folks weren't going to call the cops on them. I moved west in 2010 after this current generation of dusthead pill popping dread dudes with no principles started running around stupid. They don't care where they are or who's around, of if they're messing up their own money.
I could tell Roseland stories for days.