I should add that an while an  exotic race may appear interesting in the short term it can result in significant limitations in the long term.

For one, the empire isn't fond of non-humans which makes sneaking about under their noses very difficult.  Secondly, there'a the interspecies romance angle.  Very few romances exist outside of their ethnicities let alone species.

Really, all you need for an interesting character is an interesting background.  Humans have been interesting going for a thousand years without a new coat of paint.  So what if you have a red skinned Twi'lek?  The very fact people expect hwe to act like Darth Talon is only going to shock them when she doesn't