Why would I want to unblock my chakras and experience Kundalini?

For one thing, it feels extremely good. When you hear the yogis talking about meditation being blissful, the experience of Kundalini is what they are referring to. For another thing, it is a very quick way of getting through your psychic baggage. This is a large topic and probably better addressed in person, since how you view this is very dependant on your religious and philosophical orientation.