Personally, I would try to get time on as many different types as you can. This will help to develop a 'strategy of control' that will stand you in good stead for years to come.
Second thing is to look at some of the exercises that are done in the helicopter competitions- (I organized the first Middle Wallop competition in 1982, and could send you some of the things that were done there- all perfectly safe, but challenging).
If you don't have a fixed wing rating, then I'd also get one of those as a way to broaden horizons, and also get a FW IFR rating (cheaper than helicopters).
That should keep you busy enough!
Shawn Coyle