One man's perspective...I've never been a 'sandal' fan - just never liked my foot being fully exposed and my toes vulnerable...I used to wear various sneakers to Disney, but they are always hot, sweaty, and when wet they stay wet inside for too long, generally require socks or they can get stinky, and take way too long to dry back in the room. I wore
Crocs for a season or two, trying out something new - I liked the breathability and general comfort, but didn't like how much my feet slid around inside when they got wet.
I tried Merrill open-back mule-style mesh shoes and really liked them - covered toe, but breathable, and dried decently well too. Then I experimented with Sketchers Equalizer slip ons - very light, mesh, breathable, didn't require socks, dried fast - though I found that having a back on the shoe like a sneaker made them squeak quite loudly when I walked as the back rubbed on my heel - so I tended to wear them with socks, defeating the waterproof purpose a bit. I finally settled on Sketchers Equalizer Coast to Coast mules...and they've been a perfect Disney shoe now for the past 5 years. Light, quick dry, no socks needed, slide on and off fast, no noises, good traction, very good comfort for miles of walking, breathable mesh. Now it's pretty much all I wear at Disney.