Rattataki Jedi Sentinel
or Chiss Jedi Sentinel
As far as races not playable yet or ever
Droid (Bounty Hunter)
Jawa (Any Jedi or Sith)
Wookie (Trooper or Bounty Hunter)
Ewok (Why not lol)
Imperial Agent is great
Bounty Hunter is fun making Mako Happy with it gives a challenge
Jedi Consuler has been ok not bad but I just dont get the urgent feeling.
Smuggler line is good also
If the Jedi do not believe in love (Physical or emotional), will they not breed themselves out? Is it not ironic that Luke who becomes one of the most powerful Jedi is a result of a Jedi family tree.
The Sith on the other hand do breed like flys, but kill each other off at an alarming rate.
I guess both systems keep force welders from over populating the universe.
Are you planning on implementing Legacy options so your toons on both sides have some interaction such as trading, shared banks, maybe a legacy house or ship. They are family after all, you can choose your friends but not your family.