Hydro/aeroponics is an increasingly popular way to grow veggies and herbs (with the passing of the AZ medical marjuana laws, there are hydro shops popping up all over town in Phoenix). The lack of flavor is likely due to an imbalance in nutrient, not the lack of soil. I've been slowly putting together an aero garden of my own (been working at it the better part of a year now - save up, buy tools, learn to use said tools, do what needs doing, move on to next tool), and once it's up an running, I plan on at least one cultivar of basil, possibly others. Sounds like I'll need to keep careful notes about nutrient balances and the quality of leaf...