Varieties I grow every year include:
Climbing French Bean - Cobra
Tomato - Sakura (in tunnel, tall, cherry, delicious, copes with blight, forms large crowded plants which go on producing fruit until Christmas with fleece for frost protection, just needs side shoots supported with more canes) - obviously not the one you want HesterF but I love it
Sugar Snap Pea - I think it's called Quartz
Potatoes - Cara (blight resistant and a good looking, tasty tattie), Mayan varieties (tasty), Lady Balfour (a bit blight resistant and tasty) - (I love King Edward but it's very susceptible to blight here). I always grow several new varieties each year in addition to the favourites.
Brassicas - Purple Sprouting Broccoli (usually mixed from DTBrown plus one of the summer croppers, Claret this year), various
kales such as Pentland Brig (old variety), Dwarf Green Curled, a curly red one, Westland Winter (tall, curly), Brukale Petit Posy (like a leafy blown Brussels sprout, much nicer taste). I usually try new varieties as well, this year I have Shetland Cabbage (not a cabbage !) and Sutherland Kale, sometimes I like Russian Red.
I no longer grow cabbages, cauliflowers or Brussel Sprouts.
For carrots and beetroot, and especially lettuce, I grow a wide variety every year, old ones and trying new ones. For other things such as squashes I try different varieties each year, although there's usually a couple of Courgette Defender in there for its CMV resistance.
I tried Pea Blauwschokker one year and it grew to an enormous height, but the peas were horrible so I won't be trying that one again.
Modified to add: I've just had an email from someone explaining that Blauwschokker is a Dutch pea meant for
drying 
What an eegit

I am

No wonder it tasted dry and floury as a green pea

.
As a drying pea it would be great - very heavy cropper with plenty of peas in the pod and it's a lovely bluey purple. I must look through the catalogues (I think it's in Chase Organics and Real Seeds) and see if they said it's for drying and I'm just unobservant