Cardboards aren't so practical for playing, esp. TTi releases since they don't really have cases to slide out of the boxes, just plastic "beds" that are ass to remove. But I leave all my hucards stacked together for easy access so I don't care.
I like boxed games but I don't like paying a premium for them. I do have Falcon, Bravoman and Sonic Spike in their boxes here, that didn't stop me from playing them (sonic spike stopped me from playing me with its awfulness but that's another story).