If you've got the option of either - and you want to fly turbo-props, fly turbo-props. If you want to fly jets, fly jets. It's that simple.
I prefer flying jets myself, and personally there's not a whole lot I'd be doing in the left seat that I'm not already doing in the right - except getting paid more for it (not to mention that I'm already getting paid more in the right seat of a jet than as a turbo-prop skipper anyway). And if that sounds like a flippant remark, rest assured I'm well aware of, and have great respect for, the fact that good command skills are so much more than how well one flies an aeroplane - or what type of aeroplane it is. But then I'm also not a 22yr-old-Gen-Y type who's been with the company only 12 months and already bitching about why I haven't got a command yet. All things in good time...