How Important is a Good Trainer?

I think there's more than just good and bad but there's good and bad for the individual.

I've moved around a bit etc, been in some gyms with multiple trainers etc. I find everyone has a trainer they prefer and not everyone agrees.

I think style, the stage you're at and the amount of coaching you need and how much you need to talk through what you're learning or how much you need to be shown all makes a difference.