Make sure you enquire about dates in advance, even if it's 2 years in advance! Most suppliers including myself will let you book your date and decide on the details closer to the time.
I always love to add personal touches to cakes, whether it's a subtle encorporation of the husbands favourite football team or their children's initials, it's always nice to make the cake personal to them.
Once we have discussed availability, I prefer to have a chat about any design ideas and quote a few of the designs to give couples a better understand on prices before we meet, and even design a bespoke cake for them. We will then arrange a consultation, at which couples can taste some samples and finalise any other design details.
I don't have one particular signature cake, but all of my cakes have a smooth and sharp finish to them.