My first clipless pedals in 1992 were Look road pedals that took the delta 3-bolt cleat and I used the red version that allowed a bit of "float". They worked well when riding but were a horror to walk in (even with cleat covers), the single side engagement was a nuisance in traffic or town riding and they had a strong tendency to squeak that no amount of oil or was would quiet down. I was happy to replace them.
My next pedals were Speedplay Frog which had a ton of float, were two sided and used recessed cleats. They were very good and light but both the pedals and cleats were expensive and not sold by a lot of shops. They are no longer made so they aren't an option in any event.
I finally settled on Shimano PD-M780 XT-level MTB pedals for my road bikes. They are two-sided, reasonably light, reasonably priced, the cleats are easy to walk in and they are extremely durable. After probably 150,000 miles using them I see no reason to change.