With both Egyptian Spinies and ASFs, it’s not so much that they have aggressive temperaments, more that they’ve not been domesticated for nearly as long as regular mice, and so they still have a big fear of humans.
With my spinies, I have never had any aggression from them. However, they’re very, very fast and also quite shy. My female is fairly bold as always approaches me, has a little nose of my fingers and allows me a quick stroke. My male, though, generally avoids me at all costs. At this stage, it’s not possible for me to pick them up and get them out of their cages because their speed combined with their fear would lead to me never finding them again!
While I of course don’t expected to be able to breed them into a slower species, I’m hoping that several generations down the line I will have been able to breed them to be much more tame and handleable, through a careful selection process. I’m not sure where you are in the world, but in the US animals tend to be further along the domestication process than ours in the UK. But really, for now if you want an animal that can be tamed and stroked easily, you’re better off going for mice and hopefully within a few years we’ll be seeing much more tame spinies and ASFs up for sale! :)