I guess it depends on the type of riding you do and the types of trails and roads you encounter. I still like my non-suspension mountain bike (and road bikes), but almost all of my offroad cycling is on relatively tame, very non-technical multitrack trails. When I tried my elder son's Cannondale Rush (his college graduation present from me) and a friend's early full-suspension mountain bike, I was unable to get used to the up-and-down "squishy" feeling, but "chacun à son goût," as Strauss's Prince Orlovsky would say.
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"Far and away the best prize that life offers is the chance to work hard at work worth doing." --Theodore Roosevelt
Capo: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger (2), S/N 42624, 42597
Carlton: 1962 Franco Suisse, S/N K7911
Peugeot: 1970 UO-8, S/N 0010468
Bianchi: 1982 Campione d'Italia, S/N 1.M9914
Schwinn: 1988 Project KOM-10, S/N F804069