ok im not a park rat but i do enjoy flying off kickers and do an occasional box here and there but most of my time is spent carving on the steeps.
where i do most of my riding, the snow is icey and hard packed so good edge hold would be ideal *duh* but then again I dont want my edges to be too Un-forgiving...
For a good all around and more forgiving edge, you could go with a 1 degree base bevel and a 90 degree edge bevel that will give you a corner of 91 degrees which is very forgiving for learning on and can easily be changed to a more aggressive edge as you progress
make sure you are looking at file guides for the base and the side edge. They are different and usually aren't interchangeable. In general I would leave base bevels to an experienced shop and only tune side bevels
a side bevel angle is the angle in relation to the base of the board or in relation to the base angle already beveled
base of the board. ie an 88 degree side edge bevel is 88 degrees to the base of the board, but the effective angle with a 1 degree base bevel is 89 degrees and with a 2 degree base bevel is 90 degrees.