I've tried a wild flower section in our garden, once established it looks fantastic however until that point it looks awful and unless you're really accurate with seed distribution then flowers popped up in the surrounding area, some almost a handful of metres away depending on the weather conditions at the point of sowing. If you have the garden to suit, it can look great...for me it was a little 50/50. Horses for courses.
For the space I have available I've bought Roses and aimed for strong scented/cut flower varieties, minimal maintenance apart from deadheading and chopping back when winter comes, the positives are that if they're successful you have plenty of opportunity to fill the home with flowers, if that is your or your partners thing.