I'm working through my second set of eight classes, the other advanced classes from the first eight. (Currently working on toon #13.)
And then I have a bunch of 'extra' characters, a dps sage and a dps sorcerer (others are healers.)
I also have an extra Powertech and Commando, because I had a blast with them the first time around.
Last two possible slots are empty, juuust in case more classes get added.
But, they're not specificly for GSF (which I don't do) or PVP (ditto, for now.) I just have fun playing whatever.
I do occasionally sit at character screen and wonder "Who am I playing today?"
I am a proud Altaholic.