What would you pick and why? I saw some people bringing it up on the personal morphs thread, and I felt it could use it's own topic. Either way, not about which would be the best morphs temporarily. For instance, I'd agree that an insect or arachnid more would be great for stealth, but I'd never want to be trapped as one. Also, nothing sapient from the series - it kind of defeats to purpose if you can still be a part of an intelligent society.
So, if you had to become a nothlit, what earth-based species would you pick and why?