I think there are two questions you want to answer before tool selection (I'm ignoring budget). First, do you want a pouch-carried multitool or pocket carried? Second, what (other than the pliers) do you want from your multitool?
The first is self-explanatory, but also affects the size and bulk of the multitool. I like the Leatherman MUT, but actually EDC my Victorinox Spirit far more often. Some people don't mind carry a large, belt-mounted multitool, others like the discretion of a smaller, pocket-carried multitool. Tool selection makes a difference, as the number of choices really affects the bulk.
The second is typically based on experience or knowing what you prefer to have on you tool-wise. I like having a decent file, saw blade, scissors, awl, and a heavy-duty flat-tip screwdriver. There are some multitools that make it easier to swap out the tools...a good option IMHO. Nothing sucks more than having two or three never-used tools taking up space, and adding bulk and weight.
You really can't go wrong with the "big four": Leatherman, SOG, Victorinox, or Gerber. They have a good selection, good customer service, and a wide array of tool choices. I would say the Leatherman Wave is likely the most common. I have a couple older versions in various bags. Size and weight can be a concern. Two very good pocket-options are Leatherman's Sidekick and Wingman. They're "budget" oriented, but solid performers with a pocket clip and svelte enough to ride in your pocket comfortably.
My choice for the past few years has been the Victorinox Spirit (currently the X-Model), which I carry in a Blue Force Gear 10-Speed pistol mag pouch. It's a very clean look, tight to my body, and secure. My only complaint with the Spirit is their choice of scissors. They work for really small stuff, but I wish they just went with their standard SAK scissors, which I think are the gold-standard for pocket-tool scissors (although SOG's scissors are easily the second best and about the best choice for actually being on a multitool).
My alternate or secondary tool is easily the Leatherman Crunch. I love the adjustable, locking plier head, and when needing three hands, it works extremely well, especially in tight spaces.
For a larger multitool, I still like the original Victorinox Swiss Tool, but I think the Leatherman Surge is the most versatile. If you're willing to experiment a little, those "T-shank" attachments open the door to a lot of options...file, and various medium-cutting saws, etc.
The only good news is that there are tons of quality choices...you just need to narrow down your specific tool requirements and preferred carry (size) method.
ROCK6