Have my new kitchen of 2 months.....these are what I love.
Waste Disposal Unit ( a controversial one as many don't like them - I love the fact that my smelly waste disappears down a big grindy place and there are no drippy slops in my bin).
A well worked out workspace where you can empty a dishwasher with only a few movements (I have mugs / cups/glasse above it and two large "pan" type 800 mm drawers behind with all my crockery - it's marvellous). And a lovely big workspace area for cooking. My island unit is my saviour
An induction hob - fantastic. They heat water quicker than a kettle, look nice with one easy wipe when done and I am loving it. You say you're having a range so this won't probably won't be your cup of tea. I did have to buy new pans but got a good deal off Amazon for a basic Stellar set (about £100 for 5 pans including a new saucepan) - my newer items (a Jamie wok etc) all worked and the induction works with any Le Creuset - I have several casseroles so would have been gutted if these didn't work there.
Double oven (well a one and a half one is a cooker and one a combi) - at a convenient height - (ie not at floor level and not too high up - I'm quite short). Having them side by side is popular but I have a bank of units across a wall with a fridge freezer, larder, ovens with cupboards above and below and , larder
My most favourite item though is the two larder cupboards with pull out metal shelves - you can store the most amazing amount of stuff in those things and actually see everything easily. I absolutely love them. If I had room for a larder walk in cupboard I might have considered that but some sort of larder cupboard where it's easy to view everything so your cooking/shopping is easier - no rooting around the back of a cupboard to find a tin you lost 10 years ago.
Underfloor heating if you have tiles...is a must - cold feet gives you achy legs and make sure they position the hot spots where you stand the most to prep - my clever builder worked all this out !
My kids love the island unit which doubles as a breakfast bar - they sit up there and eat (when we're not eating as a family at the table.) whilst I can chat with them and do stuff like make packed lunches/stuff for DH's dinner/unpack the dishwasher etc - it's nice and sociable and when my friends come round they sit up there with coffee....
Space for a table in the kitchen if you can manage it.