I have the HD-25 II and quite like them for just listening to music. Not using them professionally in any way. To compare with another product, I have the RS185 from Sennheiser also. They are very different categories obviously, but to compare the HD25s work well for me because the side of my ears don't touch the ear pads constantly like on the RS185 and maybe other medium sized over-ear designs, and the HD25 being closed back vs. open back (RS185) aside from potential drawbacks means the bass is present, only slightly over emphasized for me to be honest. Also, the clamping force gives passive noise isolation which for others may be uncomfortable, but I don't mind it. The comfort with different models will depend on your head size, ear shape and size, etc...
Ultimately I really like the sound, and could do a lot worse I think. Maybe I'm just used to it now. Having said that I am currently looking for ones that are wireless and have a decent non-boom microphone which is very limited. This because I'm tired of having wired ones and am looking to experiment with new models. I wish the HD25 had an input jack, as I could at least easily connect a bluetooth amp to them. You can do this with HD25 but you'd have to cut the wire to keep it short, and potentially glue.
They have been useful when on Zoom calls recently, in big groups, I can much more easily hear what everyone is saying compared to my mono headset, so in that aspect of being a monitoring headphone I suppose that can be a positive.
Another thing, I've had them for like 8 years and feel they could last forever. An open back AKG model I had aged much more quickly, but your mileage may vary.