How many seeds do you really need?

I have seeds for many different vegetables and many different varieties of most of those vegetables. So I've been wondering how few do I/you really need? 
Let's start with essentials - the veg that you always grow and couldn't do without. For example - tomatoes - but which one?

Let's start with 10 (or less) essential veg, then we'll narrow it down to naming the variety. 
 My essential veg are :-
Tomatoes
Courgettes
Lettuce
Mangetout
Beans
Cucumber
Rocket
Kale

Oh this will be very interesting

Tomatoes
Courgette
Squash
Pumpkin
Chilli
Basil
Kale
Lettuce
Beans
Broccoli

My essentials:
Tomatoes
Cucumbers
Courgettes
Beans
Carrots
Broccoli
Sweetcorn
Peas/mangetout
Onions
Chard

Tomato: Gardener's Delight
Lettuce: Little Gem (mini cos)
Bean (pod): Montegusto (yellow climbing)
Bean (dry): Jacob's Cattle
Courgette: Rugosa Friulana (yellow, warty one with delicious nutty flavour)
Pumpkin: Uchiki Kuri (small orange squash)
Basil: Greek (small leaves)
Sweet Pepper: Jimmy Nardello (thin red pepper)
Chili: Basque (very fruity and mild)
Mangetout: Green Beauty (purple flowers, tasty and tender)

Here’s what I grow each year.

Tomatoes
Cucumber
Basil
Lettuce
Chard
Kale
Courgette
Carrots
Parsnips
French beans

Thanks for your lists - especially Garrett who anticipated the next question..........Which variety of each would you grow?

My essential veg are :-
Tomatoes - Gardener's Delight
Courgettes -All green bush
Lettuce - Mixed seed
Mangetout - Bijou
Beans - ? Climbing French Bean
Cucumber - Beth Alpha
Rocket - Salad
Kale - ??

My Favourites to grow

Tomatoes - Black Cherry
Cucumber - Beth Alpha
Basil - Genovese
Lettuce - A few out of each packet
Chard - A white stem variety
Kale - Nero di Toscana
Courgette - Black Beauty
Carrots - Chantenay
Parsnips - Any
French beans - Blauhilde

This might be a bit difficult and liable to change. I think I must give Rugosa Friulana a go. Then again, are we choosing to cope with Armageddon, or just choosing our favourites. The criteria might result in slightly different variety choices. Favourites might be the most flavourful, whereas Armageddon would require resilience and productivity.

My essentials:

Tomatoes - Cherry Honeycomb, Beefsteak Burlesque
Cucumbers - Delistar
Courgettes - don't know but it might be a pale green Lebanese type
Beans - DFB - Rondo, CFB - Hunter or Helda
Carrots - Early Nantes
Broccoli - any tenderstem variety, say Matsuri or Skytree
Sweetcorn - Swift
Peas/mangetout - Carouby de Mousanne
Onions - any good storer
Chard - Fordhook Giant

"This might be a bit difficult and liable to change. I think I must give Rugosa Friulana a go. Then again, are we choosing to cope with Armageddon, or just choosing our favourites. The criteria might result in slightly different variety choices. Favourites might be the most flavourful, whereas Armageddon would require resilience and productivity."

I don't have a real reason for asking - are you surprised? Basically, I looked at all my seeds and thought "Most of these I will never attempt to grow! Each year, I go straight to my favourites with maybe a couple of other varieties for......variety!"

Every year, I could buy the same 10 packets of seed and grow enough to keep me happy. If they were not F1, and I could save seeds from, I would never need to buy any more seeds.......ever. Of course, I know that I would acquire more through swapping, but the principle is the same.