Is there any good micro USB cable (not loose)? 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.
The micro USB cables that come with BlackBerries are great, the connection is not loose at all.  (I've tried one with my Android phone).  So I'd have to say that your cables are indeed "bad".