It depends how big it is, and also what you decide that you want.
For example, would you like a wild flower meadow that also has some daffodils as they flower early?
Do you like buttercups and daisies and dandelions?
Some people do, delighting in their naturalness, some people regard them as weeds.
Do you use weedkiller, or do you shun the very idea of putting stuff like that on a garden?
Do you like the idea of having your garden like a smaller version of a sculpture garden?
Do you like the idea of a formal garden with everything in rectangular sections so that it has symmety when viewed from an upstairs window?
Do you like trees? If so, how many could you have in your garden?
What is your policy to plants that just appear? For example, if you spotted a small birch tree about 6 inches high that had grown from a seed that blew in on the wind and landed where it did and germinated and grew? Would you remove it, or would you regard it as a happy thing that had happened and leave it to grow, but if it is right by the fence or the house carefully move it in a large cube of soil and resite it, even if it takes a bit of work?
Or would you like a mixed garden? A number of small areas around a path, a wild meadow area, a sculpture garden, and so on.
Do you like the idea of a sundial as a feature?
What would you do if you found a dock plant growing in your garden? Regard it as a weed and destroy it? Or delight that nature had provided you with a native plant?
What about a packet og giant teazel seeds?