I can easily copy and paste and move files around between the phone and the PC with no hassle, no drivers at all, no extra programs, and that helps a lot with my studies.
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weird, i'm using android (and symbian OS that works with generic mass storage since S^3)) for years and copying, moving files between PC x Phone is never a hassle, no extra driver, no extra program.
On the other hand with iPhone... last time i remembered my friend forced my to instal iTunes just to copy some file. uuuuuugh
as for windows phone, they now allow generic mass storage driver? or they still forced you to use "media device"?