It's just hair.
I don't think it would suit him anymore. It went well with the angry white boy image, but personally, I associate blonde Eminem with drugs, and it would just be weird for me to see sober Eminem with bleached hair.
Plus he seems really frugal now, and he said in a Relapse interview, I think with Westwood, that bleaching his hair cost him like 4 million over the years [

], and that that was part of the reason that he stopped doing it.
But strictly from a female point of view, he was adorable with blonde hair.
He's hot with dark/natural hair, but he was straight up cute as a blonde.