Yes, we do have a large nettle match... we do have to keep it in check as it has a tendency to take over! Was full of ladybirds, spiders and dock bugs when I looked earlier today
Butterflies do like them, Small tortioiceshell and Peacock caterpillars use it for a food plant :-)
Oooh sounds planning a new garden layout is exciting... I recomend a small wild pond if you have the space :-)
There will definitely be water. We had a pond before that attracted frogs and newts as well as the insects. Space is not really a problem in our big garden.