I just can't do without the following (in order of importance).
-have the phone auto switch to vibrate mode according to appointment entries in calendar. And auto switch back to normal mode after that. Also during meeting only allow calls from important callers. Other callers sms is reverted. It sends shiver down my spine that if I use iphone I have to remember everytime to flip the mute switch before and after every appointment.
Actually, there is a jailbreak to do this one. Yes, it's silly the phone requires a jailbreak to get such functionality, and it's better to have the flexibility to do what you want without being dependent on members of the jailbreak community. But for me, this was enough.