I carry a Leatherman Rebar when I know I'll need a few more tools in my pocket. It's only a few times a month but when I do it's indispensable.
The size is both small enough to fit comfortably in my pocket while be substantial enough to feel like a real tool. The tools I use the most are the pliers, Philips screw driver, and wire cutters.
This model locks the tools while they are open which I prefer but it lacks scissors, a replaceable bit driver and has, in my opinion, a light duty knife.
The biggest reason was form factor then price. I wanted something that could fit my pocket comfortably. I already have a dedicated pocket knife and screw driver so while it would be nice to have better options those weren't too much of a concern.