hehe, miniature tabletop wargame. played with dice and rulebooks, only you don't have to use as much imagination as compared to D&D. You paint and modify the miniatures as you want and get to create your own terrains. I got addicted to the actual miniatures' design and sculpting back in highschool, 7 years back. They used to have so many pewter figures now things are getting cheapened down (not the price though) with most of the stuff being done in plastic although there are much more details and better more dynamic poses from the figures, and more opportunity to kitbash and do major conversions.
Good paint job on the cadian IGs. Interesting idea putting the nozzle from the missile launcher onto the heavy bolter. I recently purchased a full battle force of the cadian army and a basilisk (i went to the hobby shop just for the basilisk though) just cuz I thought they look so awesome and for me to have some more projects that actually can deviate away from the dear old marines.