
I had some alts on Gilga that I used for the occasional storyline purpose. However, I'm pretty attached to my main and rarely RP on characters other then her save for my miqo'te M'subi who I am slowly getting more into.
You could always use alts as crafting toons, or get them to 20 so they can get the mounts and go places. If you have someone helping you, getting an alt to 20 is RIDICULOUSLY easy if you do a nonparty system where you tag something and the lvl30-50 friend blows them up. You get credit, everyone is happy, and it requires very little effort.
It's ultimately easiest to make the alts in game unless you do a lot of messenger style RP to encompass them.
You could always use alts as crafting toons, or get them to 20 so they can get the mounts and go places. If you have someone helping you, getting an alt to 20 is RIDICULOUSLY easy if you do a nonparty system where you tag something and the lvl30-50 friend blows them up. You get credit, everyone is happy, and it requires very little effort.
It's ultimately easiest to make the alts in game unless you do a lot of messenger style RP to encompass them.