@Scottishgirl75 We did this very same thing last year, with an inheritance from my father. I spent a huge amount, but we had an extension too, which meant that we were able to create a much bigger kitchen.
If you plan to stay in the house 'forever', then don't worry about what's in fashion now. I went for Hague Blue, knowing that it's very much an 'on trend' colour - but I don't care, because I love it. That said, if we decide we don't like the colour, we can always have the cupboard doors/drawer fronts repainted with another colour.
My advice would be to start with the appliances you want to have, and then build the units around that. For me, it was my fridge and freezer. I didn't want an American fridge/freezer, because the freezer part is always too small - especially if they come with an ice-maker. Instead I went for side-by-side 60cm wide fridge and freezer, so have loads of space - most of the food I buy needs to be in the fridge, and I cook and freeze a lot too. It also means I have a drawer in the freezer just for ice!
As PP have said, avoid a wooden worktop. My DB and SIL had one in their new kitchen. It looks lovely, but it needs a lot of work to look after it.
If you can stretch to a hand-built kitchen it will give you a lot more flexibility - and you can work with any odd-shaped sizes/spaces that you have.
A glass splashback can add colour (lots of different colours to choose from) and is so much easier to clean - and will stay looking clean - compared to tiles
And definitely go for drawers rather than base units. So much more space.
This is my kitchen: