I was working away with some colleagues in a different part of the country recently. I spent 3 evenings with them, we went for dinner. I am an introvert so needed some time to recharge, so told them on the fourth night I was going to do my own thing - I went for a lovely facial, nice stroll and read my book, got room service. I knew by their reaction that they thought this was a bit odd, but this is just the way I am and had enough, after spending all day working with them also. I'm someone who needs time on my own every so often - but do people consider this odd?