I'm hardwired. Nothing happens without nipple play. It starts slowly but escalates quickly and can take what most on this board would consider pain, though for me it's just enhanced sensation, booth to my tits and dick.
The best oral technique is what I refer to as "nursing": tongue on the bottom, teeth on the top with a steady suction. Done properly and with attention to whichever tit isn't being sucked, I can be up and running in just a few seconds.
My pet peeve is any kind of lube on my tits. It deadens all sensation immediately. It's not unusual for me to insist on several showers during a single session. Because I edge (and three hours is a quickie for me), titplay can either trap me on a plateau or move me up to the next, but at a certain point, rough titplay can no longer be tolerated, though moderate play is still required. Lots of guys understand this, but those who don't get neither my seed nor a returned call.