On-ear have an advantage (in my opinion)...
...to be more portable (but I feel like a lot of over-ear can fold away into a small package for travel [ex. UE4000 versus UE6000], so this doesn't seem like an advantage. Furthermore, IEM tend to be more portable than on-ear)
...on-ear models usually are cheaper than over-ear?
On-ear is in a disadvantage (in my opinion)...
...they are usually less comfortable than over-ear
...they tend to isolate less than over-ear and IEM
...they usually have smaller drivers than over-ear
...they usually have smaller soundstage than over-ear
I feel like I'm missing a crucial importance to On-Ear headphone design, to a point where I feel On-Ear headphones are unnecessary. Could you share why you use On-Ear headphones instead of IEM or Over-Ear?
P.S. Please do not get me wrong by making this thread. I love my on-ear DT1350 because of the sound. But I feel like that's the only real advantage they have over my other headphones unless I'm missing an important point?