Arianne Volar (played by Steve)
Arianne began as an idealistic rebel officer. She slowly evolved into a Jedi Knight over the course of the years. She has the dubious distinction of being the de-facto 'leader' of the group. I say dubious because as the other character's personalities became defined, the 'leader' position made you the target for a lot of grief.
Many. But the one that comes to mind is her trip to 'Chez Domination' when she was preparing to seduce an Imperial officer. Of course, any of her comrades will remember her 'ego signature', delivered via comm or otherwise to the Imperials as she escaped once more: "Love and Kisses —AV"
Marko "Fat Man" Razmussen (Played by Scott)
Corellian Smuggler who evolved into a commando and was, for a time, the best dodger in the group.
Also many, but again, some stand out. First of all, there was the time he was a bit...mean to the ship's ever expanding population of droids and woke up one morning duct-taped to his bunk. Then there was the time he worked for Alliance Internal Affairs to inform on and investigate a possible traitor in the group (this was a masterful bit of playing on his part and I was quite pleased when this was revealed to the entire group and they were actually surprised). His nickname of 'fat-man' was an in-joke with the group after Scott had put down a rather hefty 230+ for his weight and didn't really have the height or stats (Strength/Stamina) to back up being 'muscular'. It was Harold Hugganut's player who pointed this out, and the nickname carried over from out of character to in-character. To Marko's credit, though, he went on a diet shortly thereafter.
Ruu'khan and Horatio (played by Todd)
Ruu'khan was the group's wookiee. Big and bad with a quirky sense of humor (mirroring his player's). Horatio was a pirate who joined the group later and, despite having proved himself in several missions, is still considered the 'Rookie' of the crew. Horatio is in love with Arianne's adopted 'Ward' Reen (much to Arianne's chagrin).
Ruu'khan had a taste for strange weapons. For a time, his primary one was a power-prybar, which he put to good use against the Charon. There was also his liaison with a blonde female wookiee that nearly shook hotel the two of them were in to pieces. Horatio (as noted before) is probably best known as being a thorn in Arianne's side (in regards to her Ward). Plus, as I recall, the rookie is something of a smart ass.
Rick Oman (aka "Fenn the Mandalorian) (played by Steve—the other one)
Began as a Mandalorian bounty hunter working for the Rebellion and, through a time-travel incident, wound up trapped in the Clone Wars era. Eventually became leader of the Mandalorian resistance against the Empire under the pseudonym of 'Fenn' (yes, the Fenn from the comic books)—where he eventually met himself. Yeah. Time Travel adventures really mess with your head. In any case, he's now the Governor of a Free Mandalore.
Oman/Fenn is very well known for his gunnery skill, even going so far as to install a luxury seat within 'his' gunwell. And then there is the incident which nobody in the group (especially me) will ever let him live down. Suffice it to say that even bad-ass Mandalorian armor is sometimes no match for a primitive ape-man with a big rock and a good throwing arm. My personal favorite of his moments, however, was his whole 'Omega Particle' con. Priceless, but too long to go into right now.
Harold Q. Hugganut (played by Rick)
Harold was a Yelsainian street-punk, gambler and con-artist. He may no longer be a punk, but he's still a con-artist and gambler. He's also 'gone respectable' (in the mode of Lando Calrissian), using his generated wealth to create his own planetary resort. But don't let the nice suits fool you, he evolved into one of the deadliest pistoliers in the party.
Where do I start? Could it be the time his player actually cheated me in real life while playing a 'live action' version of Sabbacc as part of an adventure? Or maybe the time he programmed his droid to always refer to Arianne as one rank below her current rank (much to Major, err.. Colonel Volar's chagrin)? Or maybe even the time he 'complimented' an aging Han Solo and Lando Calrissian by saying "Gee, you guys used to be my heroes".
A tusken raider Shaman who somehow wound up traveling through space and joining the Rebellion. Over the course of play, his meagre force powers grew, eventually allowing him to reach the rank of Jedi Knight.
Again. Where do I begin? I think 'Bob' holds the record for memorable quotes, including his Tusken lamentation about the type of planets they always visit: "Always swamp planet or ice planet... swamp planet or ice planet..." and the time he commented on his first time ever attempting to fly a starship (in an emergency, of course) "How hard can it be to land. Planet big. Ship small." Bob was well known for his penchant for charging into the line of fire of the rest of the party—Gaffi stick in hand. Fortunately, he was equally well known for being gunned down or knocked out shortly thereafter, thus clearing the lanes of fire.
These were the first six main characters, I'll continue later down memory lane with the rest.