EBU rank: Premier Life Master.
I play my own "Grumpy Club" system in partnership with my wife.
Short (forcing) 1!C (11+hcp, no better bid)
Natural 1!D, 5 card majors, weak NT.
Multi 2!C, 2!D and 2NT opening bids, Ekren-style 2H, normal weak 2S.
Plus... it's free!