I've hated everything Office for years. Every single piece of software they offer has a much more powerful (and free) open sourced alternative. I don't see any of this crap changing my mind any time soon.
MS Access has no open source equivalent. Some small businesses would flounder without it.
If you don't need to share xls/doc files, then yes, more power to you, but if you do, you will run into problems using opensource alternatives.
Open source alternatives use standard formats, so it's really better than xls/doc files, for short and, above all, long term.
(Google should have staked out a spot in this inchoate note scene when they introduced pen support in ICS, and Samsung launched the Galaxy Note, but stock Android doesn't even have a bundled Notes app much less something to compete with OneNote)