Aamon is a pretty nice guy all in all, i’ve noticed he’s mostly indifferent to the whole light/dark, heaven/hell dualism most of the world is at right now, so he’s very user friendly in that way, not an especially baneful spirit so don’t worry about that, although he can bring a great deal of havoc into other people lives if asked to, he’s much more a spirit of divination then anything else with a particular passion for the Tarot so is a good spirit to work with in developing the skill at it.
What you should expect is the same as all evocations, that when you summon him, he will show up, if you ask him questions you will get the answers and if you give him a task that is in his power to do, it will be done. And above all you will be successful.
