I will watch any cricket that is on. Internationals, one day game, T20, Pro40, the lot.
However, for someone to describe The Ashes as one of the biggest events in world sport is totally false.
Most of the world couldn't give a stuff about cricket (not that that automatically makes it false - The Superbowl is still a big, if not massive, event).
But, more importantly, to the rest of the cricket playing world, The Ashes is just another big series, albeit one that has slightly more history and meaning than most.
Pakistan/India series' could be argued to be just as big but, quite honestly, hardly anyone here gives a shit about them, apart from those qith family background - and this is one of the few cricket playing nations.
Regardless of your opinion of test cricket versus the shorter game, the cricket world cups, T20 and one day, are far bigger sporting events, and that's just in the world of cricket, as they appeal to people from everywhere around the world.
I bet even the IPL gets bigger global viewing figures than The Ashes.