It is of course, a horribly stupid idea to say of the entire symphonic output, written over the course of 200 years "I like the x movements best". Hence the poll.
So, in general, do you enjoy symphonic first movements best? or slow movements? Or dances? Or finales? I have taken the standard four movement format, though of course the middle two movements especially are sometimes swapped around: the type/tempo of the movement matters more than the order.
Despite being a Haydn fan, where the slow movements (particularly in the London symphonies) are often the highlight, I like first movements best. They set the scene for the whole symphony, and still typically have a strong ending, giving them a well-rounded form. Often symphonies can feel like a first movement, followed by the other three collectively: I have no problem with this. It is this movement that has to grab the audience's attention. A failed first movement means the audience gets bored and detached, and the others have a hard time if this is the case. It has to be good.