Moved into my Victorian semi derelict house in 2009. We promptly employed the service of our local BALI landscaper to come and take a good look to advise what could be saved or rejuvenated. The reply was 'nothing' we recomend it all goes. Some 6 years later I'm still working at it. I like whatever will grow and look good in a quite challenging garden with a very high water table that is prone to flooding.
I prefer the cottage garden look but anything goes. I like to grow from seed and love the rewards of taking cuttings.