I can give you my experience since I own about 20 pairs of headphones. And no, I don't have an addiction....
All my headphones are plugged into a quality source, either my Schiit Joutenheim, or an Oppo HA-2SE, and audio files are either MP3 320kbps or FLAC. I own several pairs of planar cans ranging a from the Monoprice Monolith planar M560 and the second run of M1060, Fostex TR50RP MK II, and the Audeze LCD-2 and iSine 10. Planars from my experience are ultra resolving, almost to a fault, where any inconsistency in the audio track can be heard. The over the ear LCD-2 and the M1060 are quite heavy, so long term listening can be problematic since fatigue can be a factor if you are not built like a linebacker. The sound out of the planars is very warm and fluid, and provides an excellent sound stage with crystal clear highs, warm mids and deep bass. One thing all my planars lack is isolation, so listening to them in a noisy environment does not work well.
I also own a barrage of cans from almost any manufacturer you can think of. For comparison well use my HD650 and HD6xx cans (yes I do own both). The HD650 are really a joy to listen to. They produce almost as good of sound quality as my LCD-2, but at 1/3 the price since you can get them for a little north of $300 on Amazon these days. They are debatably my most comfortable headphones, and resolve increadbly well with a large soundstage. Where I find the HD650 lacks where the TR50RP excel is for complex music like Prog Metal. The TR50RP you can clearly hear every instrument and detail, and can keep up (when powered with a good amp) with the heavy instrumentation from multiple guitars, drums, and keys. Don't get me wrong, the HD650 do a nice job, there is just better separation out of planar cans.
Long story short, it may behoove you to have more than one set of cans for different music types. It really comes down to what you are listening to, and in what environment, and what kind of a source since any of these mid-range cans will exaserbate any recording flaws in any track.