This is sorta my point.
At my store, when I find out what chapter a person's marines are supposed to be, I REFUSE to play games with them if they swamp armies.
I don't buy the BS that jsut because you own marines they can be any chapter. No, you pick one, you stay with it.
Like I said, most people would not play me in RL if I plopped down my Dark Eldar and said it was Orks.
Either all armies can do it, or none can.
Now, if I was in a gaming group where no one cared, than neither would I. But I don't see that happening, like, ever.
I don't see why a marine player with a 500$ army can chose between 5 separate armies while my 1200$ Dark Eldar army can only play,m Dark Eldar.
NOW.... I am NOT talking about converting. I have a friend who converted Orks into a Marine Army. In this case I am perfectly happy playing either Orks or Marines.
My issue is playing Marine players who feel the want/need to swap armies on a daily basis. No sir.