Just one bow? Hummm...
That would mean versatility was key. Jack of all trades and master of none I'd say. Would need to be nearly indestructible. Would also have to be a takedown for travel. The ability to shoot a wide range of arrows would be paramount.
For shear versatility and durability, I'd have to say my ABS QN2. I'd want a set of 64" 52#@28" limbs for it rather than the lighter set I've got right now. The tuning options offered by a plunger are staggering. Has a lifetime warranty, its a 3 pc., smokin' fast, dead in the hand, and QUIET!