I used to be addicted since it was out, up until a year or two ago and they stopped patching/updating it. I used to love bunny hopping and c4-ing at the same time until they fixed that, and knife and pistol only servers were beast for levelling up (plus a shitload of fun). Had all the expansions and everything too.
Sure beats bad company 2, couldn't play that one for more than a couple days.