What Is The Best Speed Control RC Enthusiast Like Air, Land, and Sea?

I know there is a lot of debate on this subject with so many speed controls to choose from so now I am going to ask all of the RC enthusiast whether you are land see and air what do you think the best speed control. Owning a hobby shop I have used them all and seen them all but there are a lot of different types and classes. Remember for ground you have the bashers, racers, rock, crawling, basher that also races, and much more to many to list. Not only all these classes there are different scales. For the Air craft you also have so many different categories of flying like indoor flying, park flyers, and your normal outside club flying. They also have Helicopters, planes, quad copters and I am sure a lot of other aircraft and they also have many different scales. The boat people also have many different scales and uses there are too many to list. So if you can just tell us your favorite manufacture and what you use it in that will give a general idea for all the newer people out there looking to purchase one. Thank you and hope to see what everyone else likes to use for there speed controls.