I think Buffy is the character we can the most relate to.
Well, it all depends on where you come from, what's your background, but personnally, Buffy is the one I relate the most to.
You see, since I was a child, I had to take care of people I love.
I had to physically take care of my father because my big sister wouldn't do it. I had to psychologically take care of my mum. And in a way, I also have to take care of my sister sometimes, I feel like I was baby-sitting her (she's 23, I'm 19).
Buffy was 16 when she had to start saving the world.
I was much younger when I had to start looking after people.
And I always felt like it was unfair, I always wanted a normal life, where my parents worry about me, not me worrying so much about them.
More than once, I wondered "Why me?".
It's the kind of thing that make you feel like you always have to be strong, you can never fail, you must always be there for those you love. And most of the times, you have to forget about yourself, you don't have that much time to really think about yourself, and just yourself.
And, in a way, you learn to shut down your own feelings.
Now, I've grown up, I'm not anymore in this whole "Why me? It's unfair! I can't take it anymore!".
I accept things the way they are, and it became like an obssession to always help people as much possible, to always take care of them.
And I'm pretty sure that everybody, no matter what background they have, want people they love to be happy and everybody is ready to help, be there, love, in a powerful, passionate way.
I think we are all Slayers in a way. We all have to struggle with life, we must learn to be selfless sometimes, we must struggle for those we love.
When I was younger, I didn't really understood how selfless Buffy was actually, but when I rewatched it recently, it just stroke me that she was the kind of person I wanted to be, and I'm not talking about vampires and stuff, I'm talking about being that strong and human.
She's definitely a role model for me, and her character helped me to accept my situation of must-always-take-care.
I don't know where or what I would be now if it wasn't for Buffy.
She's not my favorite character, but she is most definitely the one I admire the most.