The cameras I have used range from the basic point-and-shoots (Kodak CX7330, Kodak V550), to the more advanced prosumers (Lumix FZ7 and TZ5, Kodak V1253 and Canon D10 for underwater use).
I had to began shooting with DSLRs (all started with Canon 400D/XTi) and more recently, the Canon 7D and the Canon 6D.