So much stand talk today! Yeah, I've had that issue with a couple loose McFarlane stands but the majority have been good. Like I said, Superman's stand has stood strong for what? Five, six years?
The worst McFarlane stand experience I've had comes courtesy of Storm, Aquaman's seahorse. The combination of metal pole, thin plastic base and heavy ass seahorse has resulted in two broken bases. Thankfully, Target was cool enough to send a replacement both times and now I have it pretty well rigged — but I'm still scared to touch him for fear of another break. He's really great, though.