Mascara for sure. It's a nightmare to get it of so I dont even bother using it.
I have tried and tested several eye makeup removers, but vaseline always takes the cake. Just apply some vaseline to your eyes and massage it all over your eyes. Then wipe it off with tissue paper... EVERYTHING comes off!
Sometimes I used pure castor oil to do the same.
I don't think I have found a makeup remover that works better than this.