Just about everything, really. I’m not a Linux wizard or anything, just to preface.
I like the amount of control it lets me have over everything while also not allowing me to “accidentally” the whole everything. I like that it’s fast and not resource intensive. Love that I can run it on my crunchy old netbook, and yet also my gaming desktop. Also like that it’s Xfce which I’m fond of.
I guess most of that can also apply to many other distros, too. To summarize, suppose I just prefer it.
The truth is, for me at least, my wrists aren’t getting any younger and the controller is easier for me to use.
I do still use M+KB for games and activities that need it, but if there’s a reasonable controller option I’m going to go that route.