Uh-oh...I feel a TL;DR post coming on, but I will try to keep it somewhat under control...

I've been using clipless off and on for years, on both MTBs and roadies so there are not too many versions I haven't used - but Speedplay Frogs and Light Action are among those.

However I did just go through the trials and tribulations of trying to live with Speedplay Zeros and even though a couple of my buddies love them, they are the 1st clipless pedals that I ever pretty much just gave up on and would recommend avoiding.

Everything about them, in theory, appealed to me - double-sided, rebuildable & upgradeable, yada-yada. But IRL, for me at least, they were a nightmare. Not particularly easy to get in or out of, no matter how much I adjusted the cleats (and they are plenty, perhaps too, adjustable). I had actually planned on changing all my roadish bikes to Zeros, if they worked out, because my favorite clipless pedals, that I have been using for a pretty long time, and just put back on, were discontinued and my last set of cleats, which appear irreplaceable, are wearing out.

In fact, right now I am now back to deciding what pedals to get for several bikes, and don't have a clue about what direction I want to go

Well that wasn't tooo long, was it?