Definetely artRAVE. (And I'm not just saying that cuz it's the most current … my fav single is Judas) but the artRAVE is just so up close and different and Gaga is so happy the entire time!
I think the Born This Way Ball because it's my favourite era? But yet they're all so different. artRAVE is a celebration. The Born This Way Ball is a theatrical show. The Monster Ball is a concert [[lm.pawsup]] and The Fame Ball was a travelling party from what I heard :)
The monster ball tour had better props and outfits in my opinion. And gaga's wig during it was so flawless! I have never been to the btw ball but i thought the stage was amazing! The artrave was super fun! But personally I think that the monster ball was the best tour. I just loved the theme and I loved how gaga was in all the different parts of NYC