I agree that pilot ability, and how the unit is used has a major part in it's effectiveness out on the battlefield. Clearly Suzaku's head on style is going to put his unit in more danger than the Guren or Gawain will be in since they are used intelligently in a good strategy.
Though when picking my favourite mechs I tried to put pilots out of mind, though honestly its tough to do that. Since in some cases how good the pilot has to be is directly affecting the units use. I simply like Lancelot because of its overall potential and excellent abilities. Now if it was used to that potential then it would be better off. Certainly its skill can be a detriment, because its going to take a really good pilot to make the best use of it. Your going to need a really skilled pilot for Lancelot, which isn't always going to be easy to find. Though I guess if you only have one, as long as you find that one pilot and take good care of them your good to go.
Any unit piloted not just by Zero but adding in C.C. is just going to dominate any poll I figure. I certainly like parts of it from the sheer firepower, to the interesting 'finger daggers, or whatever the appropriate term is'. Really it has a good edge just on energy. Whatever that thing is running on, to be able to fly and have those cannons is a serious edge. It's just my preference to units like Lancelot and Gawain that move quick and can get right into the thick of things. Both have good offense and also good defense. With the Gueren using it's claw arm to do both at the same time.
Guess it's just personal opinion, about what you like in a unit and whether you take pilots into account. But that's what a poll is all about. If anything sounded odd, I fall onto the defence of writing late at night
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I'm just saying that pilots will be a factor in decisions.
And, really, my thoughts have quite an influence on what I deem as "my favorites" 
Let me rephrase that then:
