The one you have the most experience with. Unless you have specific requirements where that stack isn't a good fit, or other reasons not to choose it like it's

The one you have the most experience with. Unless you have specific requirements where that stack isn't a good fit, or other reasons not to choose it like it's too niche to hire people for. Or if you're doing this for fun, use the most exciting one that still looks like it's at least somewhat stable and won't cause you too much trouble.