Character customization in SWTOR is also made possible through a concept called advanced classes. It is a specialization of your primary class into one of two paths.

Today at GamesCom 2010 the working titles of all 16 advanced classes were revealed. They are:

• Scoundrel (Stealth/Medicine; Burst ranged damage or healing)
• Gunslinger (Dual pistols, Quick draw, Ranged DPS)

• Sorcerer (Single saber; ranged damage class; Healing; Think of someone that just loves using lightning; Think Palpatine; They even heal with lighning (joke, but they do heal))
• Assassin (Double bladed light sabers, a lot of melee damage, When you think about the Assassin think about Darth Maul and Zabrak and tattoos. That’s the general vibe they are going for)

• Sentinel (dual saber (not double), melee DPS; Think young Anakin)
• Guardian (tank, party buffs, Think Obi Wan leading the attack with the troops

• Commando (ranged tank)
• Vanguard

• Operative (blaster rifle, burst ranged damage, stealth)
• Sniper (dps)

• Powertech
• Mercenary

• Shadow (double-bladed lightsaber)
• Wizard (healing; single lightsaber)

During our talk with James Ohlen, he said that they wanted to have 4 healing capable classes so that out of 16 available advanced classes, 25% can heal and when you translate that to a group of 4 there will always be one class capable of doing some heals. (If they spec for healing option of course)

Update: The full list and details of all the advanced classes has been released by Bioware and can be found in our news article here.