All of them have been my favourite at different times in my life, even white and black. I only have issue with brown although without brown you wouldn't have knots in timber and pine wouldn't give such warmth and beautiful patterns which is one of my favourite timbers. If I had to say, right now it's orange but that's because of the contrast between vivid greens and golden bog goliage with the orange golden hour rays passing over the land on a rainy sunset (I seen a few this summer and they have stuck with me and likely for a good long while, I can't think of anything that vomes vlose to that beauty in nature, hell these certain sunsets have stuck with me from 20 years back never mind this year) but there is no point in saying it is my favourite cause next week or a month from now it could be purple cause of it's feeling security or blue cause of it's feeling of airy, vastness. Idk, depends on way too many things to pinpoint to one. It's like saying what's your favourite music genre or song and to people who ask I always wanna say back "What was the favourite breath you took in your life" but that sounds too sarcastic.