Yep, it definitely depends on the pilot, the plane, and what you want out of your equipment. Personally I don't want a plane that feels like it constantly needs a click or two of adjustment all the time. At this stage of my flying I don't think I would notice the less accurate standard servo on my throttle, so since I have left over analog servos that's where I use them. But if you've got a sport plane and just want to 'burn holes' in the sky, sure you don't need to spend the extra $$$. I am trying to learn to have the most control over my plane as I possibly can, so I prefer to have the plane as accurate as possible.

I've seen these threads pop up a few times over the summer - the difference between analog and digital. What I thought I learned was that digital servos use more of your battery, use full power for all movements, and are more expensive. Somewhere I heard that they center better, though thought that it was probably something I wouldn't personally be able to notice. I just got a great deal on some new digital servos and had a set of analogs laying around, so I figured I'd do a comparison. Since the digital servos are higher torque, it is not a perfect experiment, but I did notice that the digital servos move with a much crisper action, and on higher resistance surfaces, such as the large rudder on my plane, small inputs were not dampened by forces such as (well, my hand for one) friction, or whatever else (drag) might be acting on them.

The point I want to make is that in my own experience, digital servos more accurately return to a neutral position, which eliminates the need of constant trim adjustments.