Deans for me too. I have no trouble gripping the connector, except when it is really cold out. It would be nice if Deans had an option for the same connector except with a sightly longer grip area.
Also, a lot of people at the track seem to use Deans as well, so it may be easier to find someone to lend you a pack to use if needed...
Deans Ultra here, and not the knockoff type. While the fakes might have better contact and are much cheaper, they are near impossible to disconnect. The real ones are pretty easy to unplug as long as they don't get deformed while soldering.
If I were to try something else it would be the traxxas connectors or 5/6mm bullet plugs. Like others, I don't want to swap all of my stuff nor pay for all new connectors.