I use dug beds rather than constructed beds. I can amend the soil and till the whole garden at once in the spring rather than having to fool with individual beds. It's a lot of concentrated work each year before planting time, but lots less for the rest of the season.

I'm not sure raised beds are any help with rocky soil unless you truck in an entire load of fresh topsoil. If you take good care of you soil it will improve year by year, and pulling out rocks is one of the simpler things that you can do. It was the fourth year of my garden before I could really grow carrots. The first year I pulled out the 20 cm rocks ... the second, the 10 cm rocks ... the third, the 5 cm rocks ... after that, I could grow carrots.

My soil is very clayey, so I pretty much need raised beds for drainage.

I have a friend who's having very good results with lasagne gardening. It seems to be a really great way to go with a small patch. I'd think it would be too much if you have more than a hundred square meters or so, though. She also grows all kinds of things indoors in pots in the winter, including baby carrots!