Going back to the £2 coins, I've been collecting them as a "rainy day" fiscal mechanism for three years now. My rule is to never spend one once I get given it. This does have drawbacks - I buy a copy of the Sunday Times with a tenner and get 4 back. It gets expensive! Got a few hundred quid's worth now. £2 coins do stand out from the rest of the modern coinage in my opinion - the contrasting metals, large size and interesting designs do a lot to make people look twice at their change. Just looked at my collection and am missing three of the Commonwealth ones, the Olympic one, the Burns and the Florence. Oh, and I got a Guernsey one a little while ago, which was exciting!