What makes Gmail so great?

Hey,

I was always wondering, why everyone in tech is so excited about Gmail? I am a user of Yahoo! and I was thinking, why don't you just ask The Verge? So let your creativity fly and tell us, what makes Gmail the best E-Mail client on earth.

The answer, that everyone will be thinking of is: Conversations. Of course, bundling messages into threads can be helpful, but I think that there are bad parts of Gmail as well. The whole starring, flagging, threading and sorting stuff is really annoying. Who wants to spend time sorting their E-Mail? I just use the search function and I didn't get the whole concept of the priority inbox. It is bugging me, just like the new newsstream on Facebook. I like to get everything chronological, just to be sure I didn't miss anything.

What is your point of view?