When you say you are feeling more spiritual now, that could be a feeling of contentment - being at peace with the universe so to speak, after a time of questioning and discontent. Like finally you're arriving at a point where things are starting to make sense in your own mind and you can allow yourself to be truly happy (which is a state of mind - can be achieved regardless of material situation, how others are treating you, etc).
I don't think JWs can be truly spiritual (whatever it is) because there are too many rules and regulations. There is no freedom to experience or express emotions which are outside the narrow confines of what is ruled acceptable. How can you feel contentment when there is always a fear in the back of your mind of saying or doing the wrong thing? We're not robots.
Charismatic experiences - I think that's just the brain going into an altered state of consciousness. This can be achieved by most people through meditation (with some training) - it's quite interesting and doesn't necessarily have anything to do with religion - although it's been incorporated into religious practices through the ages.