Keto Sweeteners

For the most part I try to avoid sweeteners, but when I do indulge monk fruit extract is my favorite keto sweetener, followed by stevia. I'm still making up my mind on allulose (it seems like a good option in some ways but I'm not really fond of the fact that commercially available allulose all seems to come from corn) and I try to avoid artificial sweeteners at all costs. What's your favorite keto sweetener and why?