As noted in other posts, there's a P, there's a J and there's a PJ. These are mostly separate/distinct things. A P/J may seem like a combination or best of both worlds, but it's more of its own animal. With a P/J, you can (if wired correctly) get a straight P tone and a soloed bridge J tone, but you can't really get a full J tone without a J in the neck position. When engaging both pickups in a P/J, you may like the tone or you may not - it depends. FWIW, most people I know who regularly play P/Js usually have both pickups on and prefer that unique tone.