Have you ever tried working with a kettlebell? It is the only weightlifting I do and I swear by it. It is also one of the best calorie burners, burning about 1200 calories/hr. But you should definitely get some instruction from a certified kettlebell trainer if you do.
No I haven't tried kettle bell, gonna probably start doing crossfit once I hit my weight goal. I hear a lot of things about kettle bells too thought! it's perfect for a full body workout.