I loved Christmas as a kid, I never believed in Santa but I loved the carols and the presents, decorating the house, essentially the general positive atmosphere. Plus I was raised as a devout Catholic, every time someone mentioned Santa my parents would scowl under their breath 'that's not the true meaning of Christmas...'
Although I am now atheist (my Catholic school was extreme to the point where it put me off), I still appreciate how everyone seems to magically be more positive and treat each other better around Christmas time. I am by far the most organised in my family in terms of buying presents, apparently I am something of an expert at getting presents that are actually relevant and will actually be used and appreciated by the recipient, my parents both ask me what they should get for my other parent.
Now that I am not a kid anymore, I admit that the countless Santas everywhere, the Christmas ads on TV and the overdone carols (being a musician, this is 10x worse for me, I have to actually play them a million times, so I can't just ignore them) do annoy me, and like most aspies I don't exactly look forward to the annual big family gathering, but I just go along with it and enjoy the time off from uni and work.
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Apologies for the excessive length of my posts.