Army: 1 tour flying a cab, then the rest of your time flying a desk (there are the odd few exceptions to the rule)
Navy: Lots of flying in cabs, but too much time at sea searching for the golden rivet and using those annoying words such as 'oggin' and 'shipmate'. A select few get to fly RAF Harriers but again, too much time in sh!tty sandy rocky places or..... floating on the oggin with your shipmates.
RAF: Fly any and all types for as long as you want, provided that you can cope with sh!tty sandy rocky hot places and copious amounts of b0ll0cks in the form of CDT, EO trg, orderly officer, etc.
Rolls Royce gold-plated option: RAF multi-engine fleet = flying is nowhere near as demanding as rotary/fastjet (multi-crew = spare capacity up the yin ying), loads of cash (rates), the best hotels, ATPLs handed out on a plate (multi-engine turbofan/prop, multi-crew, etc), and you will spend the rest of your life in a grobag.
incoming!