Only once as an early teen. It was cool - but I think for me the biggest advantage was that I was at an age where being different was almost physically painful and it was like the weight was lifted because we had that in common. That said, as I got older and worried less about whether or not I fit and started looking more for someone with whom I there was a good mutual match... (did that even make any sense?!?!?) - well- anyhow - it didn't really seem to matter much. I think as long as there is a good amount of respect on both sides and an understanding that whatever the similarities - you'll both manage the disease differently - it'd be nice to have that extra bit of support.
Your turn! Are you dating a D? Found one you fancy? I sure wouldn't let it stop you! LOL