Anyone ever tried this? Like with milk chocolate chips or something? I don't really like dark or bitter chocolate, and was wondering if anyone has had success using sweetened chocolate, or maybe have semi-sweet, and half sweetened.

You can use bittersweet, semisweet, milk or white chocolate to make ganache (don't EVER use unsweetened though, YUK).
Use whatever makes you happy! The ratio is 2:1 for bittersweet/semisweet and probably 3:1 for milk and white chocolate.