String theory is seductive as it is almost a natural progression to go from point-like particles to strings with different patterns of vibration. Also, it seems to have a natural handling of gravity and so promises the holy grail of unification. It's almost like a mathematical formula that's too beautiful to not be true (though there's plenty of examples of beautiful maths that fails).
What I find curious is the “observed” properties of the whirlwinds within each and every proton & neutron are so phenomenally complex, I would not be surprised at all if the mathematical abstractions of strings represent another quantum ecosystem we may never be able to observe