It is good to fail fast, but you need to prototype or start implementation before you do. There will always be a side that doubts but the entrepreneur in you needs to believe, but also be realistic.
I am always surprised what sells, so you don't really know if an idea is good until you get it out in the market. Your intuition is good to go by but your intuition may also be completely wrong about what might work as well as what might not. Only the customer/market gives you the real answer.
Also don't just do an idea because you think it will work, do one that solves a problem that you are interested in. This will retain your interest and fuel some belief.
It looks like you are bailing at the 'crisis of meaning' http://i.imgur.com/DEOmi.jpg . Sometimes this is correct, other times a friend or community can help you through it. The quicker you can get to market to test the better, all other input is just opinion.
I am always surprised what sells, so you don't really know if an idea is good until you get it out in the market. Your intuition is good to go by but your intuition may also be completely wrong about what might work as well as what might not. Only the customer/market gives you the real answer.
Also don't just do an idea because you think it will work, do one that solves a problem that you are interested in. This will retain your interest and fuel some belief.
It looks like you are bailing at the 'crisis of meaning' http://i.imgur.com/DEOmi.jpg . Sometimes this is correct, other times a friend or community can help you through it. The quicker you can get to market to test the better, all other input is just opinion.