Worldbuilding

Seeing as how this has persisted through both my longest-lasting conworld and my most detailed conworld, I'd say a race of sapient doglike creatures. While part of the appeal of of dog ownership is that, compared to humans, dogs are emotionally simple critters with uncomplicated needs, A big part of me wishes I could explain things to my dogs in a way they could understand, and that they had the capacity to unambiguously tell me how they're doing. I also wish I didn't have to keep burying them every 10-15 years. Ergo, sapient cynoids that live over 7 centuries it is.

Unrelated, but I would draw maps when I was a kid, just an island with blobby regions representing biomes or polities or whatever. There would ALWAYS be a lake of lava somewhere on the map.

Oh, and mechs. Big ol' stompy walking war crimes. Combine this with the sapient dogs and you get space doggos piloting mecha-Clifford into battle, good times.