You just keep asking mauser!!! Enjoy yourself, there's lots to learn.

Yeah the Royal Wulff is a pretty good choice for looks.......that's a tough one, because I'm a bit drawn to "Classic" Catskill style patterns for a nostalgia sort of reason.

As far as most effective fly for stream trout??.......that's easy. Day in and day out my most effective fly is the nymph of whatever major hatch is active at the time I'm fishing a particular stream. It changes week to week, month to month, but dead drifting a pair of nymphs is pretty deadly.
If you aren't into tying exacting copies of mayfly nymphs, an assortment of "Pheasant Tails" in sizes from #10-#22 will catch a lot of fish.