With an RDA generally you HAVE to take direct lung hits, unless you turn air flow all the way down to nothing. Not really a huge fan of doing that though, so I just take the big-uns now. Gives you a better taste too IMO. That being said, there is definitely a more noticable throat hit by taking the mouth>lung hits like a normal cigarette. So if that's what you're looking for, maybe you'll want to take mouth>lung hits instead. Different strokes.