I rolled my first smuggler as a male, and was super pleased with Corso all the way through the entire story line, and even into the level 55 content! There's no mistaking his "YEEEHAAAW" and his remarks are always a giggle. His location observation remark on Taris is one of my favorites in the game: "Why do we always end up walking through sewers? Just once I'd like to leave a place smelling like flowers!" I enjoyed Corso so much, that I rolled a female smuggler just to see how the relationship pans out.
Regarding the next companion for the 101 series, My vote for the Inquisitor is Talos. He's quirky and pro-empire, but his adventures as a part of the Reclamation Service and super inquisitive mind that is always trying to draw new connections to everything would be really fun to have expounded upon.
Also, for future reference as the Inquisitor is the next up, I would vote for:
Vector as a great companion to look at more deeply. He's easily one of my favorite companions in game.
Blizz is another great choice! He's just so much fun, I respec'd my PT so that Blizz could tank for me.
Jaesa would be my next choice in the SW line as she's the only companion whose character is dependant upon the decisions the player makes to acquire her, and I think that she'd be great to review just to side-by-side the LS and DS versions
For the republic, I would like to see:
Scourge His dedication to the Empire is best served as a Jedi's companion.... that should be all the motive anyone needs to want to learn more about this fascinating, Pureblood.
Nadia would be a great companion to look at because she's new to The Order and to The Republic. I would like to see a bit more of her perspective from growing up (perhaps without all the dead father baggage, and more of the relationship with her dad)
Akaavi For the Male smuggler, there's no doubt that she's wifey ;-) While she may seem simple enough (GRRRR MANDO GRRRRRR) her complexities come out as you get closer, and I'd like to see some of that elaborated upon.
M1-4X Eaily my favorite trooper companion, I would like to see this blog APPLY OVERWHELMING FORCE to give me more of 4X. He's not your everyday droid, and his personality wasn't crafted with traditional Republic.... um... oh the word.... weakness.... no..... more tolerance. He's just not your average Republic mind with his dedication to extermination, genocide and total victory.