Love my limestone floor BUT you would not believe how far a jar of jam can spread when dropped on it.
If you have a granite worktop, check how far it overhangs the dishwasher. We've lost no end of glasses and plates as I swing them out of the dishwasher & catch the edge on the overhang.
If you get granite, get a mottled one, doesn't show the marks
Big pan drawers. Really didn't want these but DH did, couldn't do without them now.
I big corner cupboard (you know, the corner where it's always difficult to get into) to put in those huge woks & pans that you use once every 3 months.
Pull out larder cupboard, great.
Make sure there is somewhere near the cooker to hide oils, spices etc so you can reach them & continue stirring the sauce.
Kettle, mugs, spoons and tea/coffee cupboards should all be close enough so you don't need to move your feet
Think about what you use & plan each cupboard it will go in BEFORE you plan the kitchen. We had building work done so had 12 months to plan where everything was going to go. DH thought I was mad but appreciates it now.