Libido is definately one of the signs...At 191 I was feeling lethargic, unmotivated, tired, and of course no libido.
If you are debating AAS or TRT I think the simple question of whether you want to bring your ranges back to normal or you want to go higher. If you are looking to bring them back to normal then TRT is the answer. You cant beat having a scrip and your MD will monitor you and get back on track whether it is gel or IM.
Good luck!