Actually heres the thing.... I already know who I want to main.... its suppose to be Marie "Totally 18" Rose. I played with her a while back and I liked her.... definitely want her as my main... but the problem is TN won't let me buy her. 
Free Step Dodge
Pictured Mind
I feel the same way. However there's always those characters you can go back to.
tokiopewpew
And I always hear: "That surely becomes boring very quickly." or "Isn't that boring?"
Pictured Mind
^ It all depends on the person. I don't even wanna play just one character for one evening.
Pictured Mind
Also depends on the character I'm using. Helena for example is fairly complex so I can use her a little longer than Rachel, who is fairly lame.
Hazard
I'm quite the opposite. I can't play with multiple characters. I've focused on my main so much that I don't have any motivation to actually learn another.
Chaos
I blame TN for creating amazing characters (-___-)
I empathise with you.
My plan was to find a complicated character that would take a long time to learn.... thats how I wound up with Sarah..... and yet I've been contemplating dumping for weeks now.