How is it leveling on a pvp server?

there are times when im playing this character and i see some blood elf running around and i say 'you know, i could kick his ass'

then there are other times when two or three level 70s are running around getting achievements or something and i say 'you know, they could kick my ass'

is it worth leveling on a pvp server or should i transfer to one later if pve starts to bore me?