Metal ore is the most commonly found type of ore.
Gathering reports from different Trux and Tools: T-Trux: "I kinda like the feel of it, but it's a little bland." Craneosaur: "No comments here." Dozeratops: "It's my favorite kind. Well, except for volcanic ore." Ankylodump: "It is the coolest kind of ore, dude!" Reptool: "It is the ore that Reptools first discovered. So, in a sense, it is our favorite type of ore."