I'm not sure if this could be considered as an Android question, but it's definetely related to Android, since this kind of cable became a standard for mobile devices recently.
The thing is, I have to work plugging and unplugging pretty often (I'm a developer), and I noticed most of the cables (or device/cable pairs) seem to be loose, some of them even lose the connectivity sometimes, and I've been looking for different kind of cables, and I really didn't find anything satisfying.
I feel there isn't much I can do, I just wanted to know if my cables are "bad", or most of micro usb connectors are just that way.
Edited to try to meet the requirements of the FAQ.