My group is all over the place. Myself, I have my Dark Angels. We have a Blood Angel player, an Ultramarine player, and a Salamander; with the occasional Raven Guard. We don't have many regular Eldar players that I am able to comment on, and I think our Guard player runs his as Cadians. Our two chaos players do World Eaters and Word Bearers.
Oh, I was mistaken. We have one Eldar player who plays his Guardian bombs as Biel-Tann