I didn't have any real problems with it. It was just small, uncomfortable, slow, and felt ancient. Gas mileage sucked although I do tend to have a lead foot. The factory shocks were garbage, even if they were Bilsteins. They were just the smallest ones you could possible fit in a vehicle. As such it floated and bounced a lot and never really felt planted. I was able to bottom them out just going over a dip in the road at speed (45-50mph). My Lexus RX350 (with the same engine as the taco) has a much better suspension and just squats and absorbs it and keeps going. Same with my TrailBoss, although not as firm as my Lexus.
edit: Those are the reasons I hated my Taco. My TrailBoss is so much better in all of the ways. It's bigger, more comfortable, fast (even with the 5.3), and the thing feels planted and less bouncy. Although my next upgrade will be to put some Bilstein 5100's (rear) and 6112's (front) at some point. I enjoy driving my truck again.