Cat Behavior....?

I have a 1 1/2 yo tortie cat (Tara) and she misbehaves alot. I spoke to people who told me that she might be doing this for attention. However I dont feel that's the case. Since everywhere I go she is there ( even when I take a shower she has to be in the bathroom too). I adopted her from the aspca when she was just a couple of weeks so she has no other owners other then me and my bf. Does the breed of a cat influence its tempermant ? If so what are clic signs of a tortie's behavior... I LOVE HER but she drives me crazy.