A cinema. Not a big multiplex, just a couple of screens. I'd like it to show the latest releases and block busters to make enough money to keep going and then indie films and old classics for those of us with different tastes.
An independent book shop - WHSmith sells the chart toppers and Sainsbury's has a few but I'd like a decent choice.
A veggie/vegan grocery. There's a lovely one in the next town but I don't always want to travel there. We have a Holland and Barrett but that seems to be all supplements these days. They don't have a fridge or freezer section any more and our small Sainsbury's doesn't sell decent tofu.
My town centre seems to be mostly charity shops, cafes and takeaways with a few chain shops sprinkled in between. We do have a good independent hardware store, though.