I liked COLEMAK until the second I had to use someone else's equipment I felt like someone broke my fingers every time.
Then I took a job that required me using a shared computer with a QWERTY layout. I hated being reduced to finger pecking like a complete n00b, and so I switched back.
15 years later I’m still on QWERTY, and wearing wrist guards to deal with the RSI. Every now and then I think about switching back to Colemak (or Workman), but I chicken out when I think of all the different keyboard interfaces I use—not just my laptop, but also my tablet, phone, wife’s laptop, etc.