Argument with Girlfriend! HELP!

Okay, this is probably a common argument anyway, but!
Me and my girlfriend always have this little argument about which is better?
Transformers or Harry Potter... In general. Not the movies or something, just the general points.
I always will say transformers... but im a die hard fan.
So what things can i say to her?! Other than the fact that my opinion is that harry potter is so very child orientated! But the problem is, she says transformers is TOO!
GAHHHHHHHHH and she has a point! LMAO
What can i say to her, that will truly make her think that Transformers is da bomb
She agrivates me with this crappy topic lOl.... DEATH TO HARRY POTTER.
(im british too, i have to put up with the dress up nerdos running around during a book release... *Sigh* shes one of them)
Me and my girlfriend always have this little argument about which is better?
Transformers or Harry Potter... In general. Not the movies or something, just the general points.
I always will say transformers... but im a die hard fan.
So what things can i say to her?! Other than the fact that my opinion is that harry potter is so very child orientated! But the problem is, she says transformers is TOO!
GAHHHHHHHHH and she has a point! LMAO
What can i say to her, that will truly make her think that Transformers is da bomb

She agrivates me with this crappy topic lOl.... DEATH TO HARRY POTTER.
(im british too, i have to put up with the dress up nerdos running around during a book release... *Sigh* shes one of them)