I learned to touch-type on an ergonomic keyboard (in Dvorak no less), and when I use a normal keyboard it tends to feel uncomfortable because my wrists are positioned at a smaller angle.

So I'm in the odd situation that I both "sloppily" touch type in Qwerty on normal keyboards, so I can keep my hands at a comfortable angle, but faced with an ergonomic keyboard I can switch to Dvorak and touch-type.