........are probably not posting/reading here.

But I know from other threads that there are members here today that have left the hobby for an extended period of time only to return, or know people that have left and their reasons for doing so.

This may seem as a strange question/post from a noob that is just beginning, but what do you see are the various causes from your experience ? And for those instances that are avoidable (i.e. boredom, as can happen with any activity), how does one avoid it ?

Thanks.