When I had my jet black E46, I used to see exactly the same model coming the other way every day. Many times I thought about giving the driver a wave, but he would probably think I was a bit of a berk. So many BMW drivers aren't interested in the car per se, just the badge.
Obviously that doesn't apply to anyone on here (as this is an enthusiast's site!)
BTW - Viv - sorry if I appear thick but what is a "TiAg" E90?