Banned for injecting your own views into banning. *tosses you back in the sea*
<Snipped quote by Jurassic Weeb>
I was thinking that it would depend on mostly size. Smaller creatures (maybe like Compsognathus) would be easier to tame, with larger creatures being less likely. For instance, the Hadrosaurids might be possible, since they're somewhat like big cows. Large carnivores would be an absolute no, however.
Sounds like someone's been watching Dinotopia.