For me it all depends on context.

As you said it is very difficult for non technical people to remember specialized titles. When in the company of my non technical friends I almost always refer to myself as an IT guy and my job as an IT job; if someone actually shows interest then I will divulge my true title with a short explanation.

However, in technical circles I am more specific and prefer being known by whatever job title I currently hold rather than the generalized IT title.