@ colubrid - I use a silver type C on my silver ego twist with both a 3.5ml DCT tank as well as silver boge XL cartomizers. I think it looks really cool, like some kind of crazy ufo looking device from the future. So depending on your aesthetic preference, type c's can look very stylish even using small tanks or other units.
I actually prefer using the type c with cartomizers instead of traditional cone covers since the airflow is 100x better, way too tight with the cone covers, cone covers with little vent slots would be ideal. Type C has 2 little grooves at the bottom that let air in for a looser pull, so your not passing out from sucking so hard.