In terms of piloting experience, ie, most hands on flying, most hours, most exciting and enjoyable to fly, what does the most low level these days..etc but also the varied missions and ops.
There is one current fleet in the RAF with a very large number of medals to it’s crews’ names. Including one individual with three DFCs. If that’s not exciting flying I don’t know what is?
But as you’ll be restricting yourself to fixed wing you’ll not be flying it.