Reasons I prefer going into the office:
- when work is done, I leave, and it's done.
- not using my resources (electricity / broadband / etc) for work.
- easier interaction with colleagues.
I liked it at the start, and liked the flexibility, but after a while hated that my home was also my workplace. I also found it was too easy to do unpaid overtime from home. After a while my productivity fell.
Caveat is I live within cycle distance to work. I hate commuting too, and wouldn't do more than 30 minutes.