ORIGINAL: torque wrench
The only factor that even matters is "which one do you prefer".
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To me, this is the essence of it all. I like all of them. <G>
However, every day there are new folks coming into our hobby that are just getting their feet wet. So, we end up repeating the same old stuff over and over and over. But that is okay. That is how new folks learn. It also keeps some of the veterans on their toes too.
I like all model engines. I think that deep down, most modelers do too. Or at least they will if they fly long enough. I even like electric motors, these days. I never thought that that would happen.