it goes back and forth around here. I'm doing my first ever grow and I did a homemade ebb/flow system. I'm very impressed with the results so far(4th week of flowering) I use a 8 gallon flood tray that did have 6, 1 gallon pots filled with hydroton, 1" rock wool, and a 14 gallon res. 3 out of 6 were females. After this grow I plan on upgraded big time. I'm still a newbie and this system is very easy to operate. My ladies are roughly 3ft tall.
So I suggest ebb/flow.