Well, which one? I thought about having the ability to choose more than one, but I want to see your absolute most anticipated feature. When Tiger came out, I thought that I would use Dashboard the most, but I rarely ever use it. Spotlight is probably the most useful feature I got out of Tiger. However, not a whole lot in Leopard makes me all too giddy. However, I'll probably end up using the new Mail features the most. I probably wouldn't upgrade to Leopard until I bought a new mac, but I probably will have to if releases FCS 6 at NAB. What feature are you most excited about.