I've been happy with my perennial MG which is horribly invasive and most sane people out here would tell you not to grow it, but I don't have much trouble since the gophers and rabbits like it and keep it under control...plus it's much drier here...BUT, the MG bug has been calling to me so I think I will have to venture there and like you, see growing them individually with each in its own space. I won't even talk about the passiflora since I love them and really have not had adequate spots for them to grow on and would not be able to settle for just one. I'm being much more restrained now in not bringing something home unless I know where I can plant it and when you love the vines, well, you know...I brought p. quadrangularis home and finally lost it since it would have needed a really strong arbor. However, we will be selling and moving and one of my prime considerations will be building in supports for the climbers....like the vitis 'Roger's Red' which is still languishing in a large pot....sigh..
Thanks for sharing your pics....