Beyond the fandom, I'm going to be honest about this fragrance. It's very long-lasting. If you're going through bottles like water, you might not be wearing it properly.
I don't think it's worth it to get the big bottle because you won't need to reapply it. It lingers in fabric and clothing, and quite honestly my entire bathroom drawer now smells like Fame.
Get the small bottle first, and it this is THE perfume for you that you're going to wear forever and always, then go for the big one.