I am a lot of the time, unless I can predict that a situation will become bad or cause stress to someone else... but I still don't lie, I just "leave out details" that would make things worse or more concerning if people knew.
I do lie, though, if someone insists on a reason for something and I don't have one. There are only so many times you can say "I don't know" without people getting pretty upset at times, so I feel backed into a corner to give a forced response. Half of the time I'm pretty sure my responses don't really explain anything or make sense according to the situation, but I don't really care at that point... any reason that will shut them up works for me, even if they only get quiet due to being confused, lol.
I have unfortunately learned with some people though, that the truth makes even less sense than a flat out lie to them... they would prefer the lie because it makes them feel more comfortable rather than me giving an honest response and them not being able to connect to it in any way. They get very awkward, so I suppose at times I do lie just to please other people, especially if I know darn good and well my reasoning really isn't as logical to them as I would like to think it is.
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Sorry about the incredibly long post...
"I enjoyed the meetings, too. It was like having friends." -Luna Lovegood