I get enough of just seeing humanoid robots and just prefer the overall wild aesthetics of animal shaped mechs.
One of the things that make Zoids unique is that it is one of the few types of Mecha in fiction that happen to be lifeforms, but with the only thing unique to them is that they can reproduce and are natural creatures that evolved on their world.
Not all Zoids are built from the ground up, some of them were caught in the wild, tamed and fitted with cockpits for the pilots.
Another thing is that there are also feral Zoids that were once piloted by humans but then escaped or released living freely in the wild.
Zoids are native to the Planet Zi, a world that is much like Earth but with two moons. Zi was originally populated by an extinct human-like race called the Zoidians which were the ones that tamed and rode the Zoids before humanity colonized their world. The Zoidians may have died out but they may have mixed their bloodlines into the human population.
"Fiona" Elisi Linette, an Ancient Zoidian pure blood was the last of her kind. Juno Hera is a human of Zoidian decent.
The Organoids are among my personal favorites. They are small Zoids that can fuse into the cores of large Zoids and give them ultimate power. Zeke, a little dinosaur fuses with Shield Liger and helped it evolve into the first ever Blade Liger. Liger Zero has an organoid but permanently fused to its core unlike the latter that can diffuse.
Organoids have a special connection with Zoidians as demonstrated with Fiona and Zeke from Chaotic Century.
Which is your favorite Zoid and series?