Rental wise? The 15 mile and Gratiot area is not that great, like I said before a lot of Mt Clemens is run down closer to Gratiot and Groesbeck. Most areas of Roseville are good, but I recommend north of 11 mile, just because I live south of it and it has gone down since I moved here,BUT there are a TON of rental in my neighborhood too. And there are really nice looking pockets over here too, I guess it just depends on which street. Lol.
PM me and I can give you more specifics. I just don't want to put my entire location out there,lol.
St Clair Shores is pretty nice too. Parts of Warren are nice.