I don't care for either as well, but I don't mind Federer TBH and I certainly despise Nadal(for various obvious reasons). Never was a huge tennis fan, the only one I sort of supported, was Agassi. Ivanisevic in 2001 Wimbledon was the only time my heart was totaly into supporting someone(I didn't like him much before that final).
Out of today's lot, Nole is certainly my favourite.