Ooo I love what you have so far! Especially throwing in a Sith Pureblood as a possible rival- they do all look like they have that 'sense of entitlement' haha
I've never RP'd or made backstories for my characters, but I'm looking forward to the Legacy System. My main is a Twi'lek Inquisitor, and I'm going to create her sister when the patch comes out - a Twi'lek Warrior, woot!
Other than that, I'm not sure what else I'll do. Probably create another Twi'lek on the Republic side (always wanted a Smuggler or JC) and make her the 'black sheep' of the clan.
My Legacy name is a Twi'lek clan name, so I want the main Legacy to revolve around the Twi'lek toons. Any alts will just be allies/rivals.