I don't mean on the same scale as my 2am Monday morning insomnia driven life reevaluation plans to drink more water, read more books and be less snarky to people. Or fleeting daydreams after a bad day in work to move abroad and do humanitarian work. Have you ever just completely reinvented yourself?
I have an old friend who did this. She always had quite a reserved personality, very dry (not in a bad way), always the sensible one in the group, tee total. Then almost overnight she moved away, had a total career change, complete change of style, interests and personality. She's the life and soul of the party, always first up to dance, always has a cocktail or whatever in her hand, really loud as opposed to previous quiet nature, loves fitness and nutrition - just all sorts of things that are completely different to her previous lifestyle. Her entire personality is completely different, the way that she speaks (language she chooses rather than accent) it's hard to explain. Nothing happened in her life to trigger an epiphany or big change, she just told me that she decided that she wanted to be X, Y and Z as a person and so in her words 'fake it until you make it'. I find it fascinating. It reminds me of one of my throwaway thriller books where someone runs off and changes their identity. I wouldn't have the commitment to keep this up for more than half a day.