Ruby, the last kitchen I had fitted was miniscule, it was 3m long, and 1.5m wide and replacing it, including new cooker, oven, washer dryer and dishwasher cost £10k including installation. New kitchens are not cheap.
If you want a continuous splashback worktop, look in to Corian. It can come in any colour you want, your sinks can be moulded out of it too as one complete piece so you have no joins, no cracks, nowhere for dirt to hide. It's really hardwearing, but like all good things, isn't the cheapest.
For me the most important would be sufficient storage, large pot cupboards, a pantry would be fab for food. Large freezer drawers (under counter ones so you can see what's in it instead of rummaging about in a giant chest freezer)
I would also like one of those hot water thingys that pour out water at 100 degrees, so you don't need a kettle.
I'd also like a marble topped bit of the counter for pastry making...
And most definitely a double if not triple oven.
We are talking fantasy kitchen here aren't we?