I'd very much like an alternative to Goblins as an evil race. In my own games I've made surface-dwelling antmen and Lizardmen which fulfill the role or modified Mountain Gnomes and Dark Gnomes to live in caves and be a bit larger, allowing both to be thieves and Dark Gnomes to siege and kidnap children, as well as 'Great Trolls', basically slightly larger trolls that are sentient. And by slightly larger I mean smaller than regular trolls because I reduced the size of regular trolls as well to fit my view of them and also to prevent GT's from being overpowered as a race. I made two entity types for them, a primitive cave-dweller type and a more advanced city-dweller type. The only difference between the two was the sites they occupied and that the civilised ones had iron weapons and also, if they were lucky, would get a coat, since I quickly figured out any great amount of clothing would slow them down to a crawl and therefore disallowed them from wearing anything but pants and occasionally a coat, and no armour because that would be too insane.
That said as much as I kind of like the style of the gnomes in DF I'd prefer a more standard fantasy gnome Civ. Because gnomes are my spirit animal. But that's just me.