[MrDosu]

I have worked on a noon to midnight in office schedule for long periods of time and noticed most people sharing the office with you take it psychologically as noon to five even when you are actually in office 50% longer than them.

[magic_beans]

If your manager is fine with it, who cares what other people think?

[theandrewbailey]

What people think can cause misconceptions, which can give you hostile co-workers and negative opinions.

[MrDosu]

There was no manager above at that point. I loved to do it because it was super efficient for me. You get into the office when some problems had already came up and people already had tried a bit of effort to solve them themselves. Then you just do rounds after lunch and fix them. Then after people went home it was a good time to review code and catch up on the personal work.

[pc86]

Nobody, until someone gets promoted and now there's a manager (maybe even your manager) who has a negative opinion of you.