I always sing off with (sliding scale of knowing the person):
With kind regards,
ContinuousMonotoneBeep
Kind regards,
ContinuousMonotoneBeep
With regards,
ContinuousMonotoneBeep
Regards,
ContinuousMonotoneBeep
ContinuousMonotoneBeep
Certainly doesn't mean I dislike the person. If that's the case then I'll sign off:
Fuck you wanker,
ContinuousMonotoneBeep
I feel I must be a lot more relaxed about things than most of you lot, you are all totally unreasonable in your opinions. I must say though on the subject of email sign offs, anyone signing off 'Cheers,' is quite frankly a total twat and should be shot. This needs to be written in law.