As a Mormon I've never had the slightest doubts regarding my religion. I did a great deal of searching before joining it and a great deal of research since.
I didn't want a religion that condemned others who weren't of my faith, and though we believe that wickedness will be destroyed before Christ's return, we don't relish that destruction as the JWs do, nor do we covet the homes of the wicked as I've heard many dubs do.
Our eschatology is one that makes sense to me, but it's really cognitive dissonance that most people wonder about. That works both ways, actually. There are many satiated religious people of all religions, but I don't see how any JW could be happy with all those meetings, and with the counseling that goes on. I think if I'd gotten involved with them that I would have lost my privileges pretty quick. I wouldn't put up with an elder counseling me on my friends, my home, job, my education or my grooming.
I also find the gloating JWs do to be appalling. There's no real theology scholarship in subjects like Ancient Scripture, History and so forth.