Agreed -- Thunderbird for e-mail. But anyway....
Outlook can be really handy in an office environment, because it supports a lot of shared stuff. If all you want is e-mail, it's massive overkill. It can be a good calendar program, though -- that's the main reason I used it for as long as I did. Now my life is quasi-simple enough that I just don't use a calendar program anymore. ;-)
