One of the significant reasons for me starting building again was the Exo-Force line. I was marvelled by the imaginative approach as well as by the poseability of the Battle Machines. I started collecting the sets and created my own Battle Machines by combining them. I found some old pictures of some of them. Be kind in your comments, these are early ones!
What I find funny is that I did the exact same thing. Same story with a little twist. Knights kingdom action figures got me into Lego. I built castles and stuff, then I saw exo-force. I h@ted it. After the first year I found some sets on sale at walmart. It was all downhill from there. Of course, your old stuff makes mine look like trash, but I got better after a week of MOCpages. MUCH better. I like the one in the third (?) picture down with th black and green.