My favourite tour is the hide and seek tour because I like seeing what villagers are there and the game is pretty fun! I also like the ore hunting tour because I find it's a really easy way to earn a lot of medals.
I love all of the nighttime tours for the music, I like the Ancient fish tour for the weather, I love the labrynth, ore, and scavenger tours because they're fun, I love the dragonfly and tuna tours because they're easy and give lots of medals, I love the spider crab tour because I've only actually ever caught one spider crab in my town.
The one I'm best at is the gardener one, where you collect and plant flowers on the flowerbed. It's literally the only tour I can get gold on elite, so it's my favorite.