Hi Fizzgigg. perhaps you should start from the other end and ask what you want your sheep to do ie what are they for.
Do you just want them for meat? In that case there is still a choice - if you have a big family you might want the largest and quickest growing breed your land can support - if there are just 1 or 2 of you and you are foodies, you will want to go for a tastier, slower growing breed such as Hebridean, Shetland, Jacob, with smaller joints.
It sounds as if your land can be wet - you will need a breed which can take those conditions ie with hard feet (black hoof is slightly better than white in the wet, so Hebrideans, Black Welsh Mountain).
If you are in an area of high rainfall you will need to choose a breed with an appropriate fleece - Hebridean, Icelandic but not the big woolly breeds like Merino.
Is your pasture lush, average or poor? The bigger downland breeds would struggle on poorer pasture, whereas some of the primitives would struggle on too lush grass, and prefer a variety of plants in their sward.
Do you need your sheep to be easy to handle? A small breed such as Shetland would be the one - they are hopelessly friendly and small.
Do you want to use their wool? There are large numbers of fleece breeds out there but again Shetlands win out, all other things considered. Hand shearing with blades is easy to learn so you are self reliant.
Do you want your sheep to be beautiful? In that case you want something like Jacob, Hebridean, Coloured Shetland, or any other breed which catches your eye - everyone has their favourites here.
Do you want to support our valuable rare and traditional breeds? There are a number of options here from the very rare which you can see on the RBST website, or more traditional breeds which vary from the primitives such as Hebridean, Manx Loughtan, Soay, Shetland, to down breeds, or breeds which are local to your area, such as Herdwicks or Derbyshire Gritstone (depending on where you live).
Do you want to sell meat lambs through a local market? - see what sells in your area.
The options are enormous, but you have plenty of time to research the possibilities.