Tap. gigas are little orange devils, basically. Very nervous, very defensive, and very fast...Plus, they're arboreal, which makes daily taks of feeding, watering, cleaning, etc. that much more exciting
If you're thinking of getting one, make sure you know how to handle fast, mean spiders.
Other than that, they're great! heh
Hmm, I've found all Taps to be nervous but not aggressive, especially as adults. They will bite if they feel trapped or cornered (like if you pin them - can't do that with a Tapinauchenius)... But if they're just roaming around they seem to do pretty well (but yes, they're quick).