Well I started 40k only 6 years ago, when I was 13. I played Imperial Guard most my life, but lately switched to space wolves. I did the occasional strange modeling on the side but because of budget I never went to crazy. Now 6 years later and 40k is a steaming pile of rubbish, and a husk of its former self. I honestly don't enjoy the system anymore. The rules are just bad so recently I've been keeping my miniature gaming satisfied with the likes of X-Wing, and Infinity. Great games they are but they do leave little room for modeling... and I do love me some modeling...
I may hate the system but I LOVE the lore and the universe, I still play the fantasy flight 40k RPG's (because besides that crap hole death watch they are all fantastic), but mostly my only gaming in the 41st millenium is through Space Hulk. My little group plays strange custom and house ruled Space Hulk, because its a fantastic game so why not make it more fun? That leaves me with this... My favorite 3 bits of lore in 40k ( in no order, and in a very general sense ) is the Squats, Genestealer Cults, and the Inquisition. That means I play squats when we play space hulk... so thats long story short what all my squats are for... "Space Hulk"/ just because they're fun to model....

I call it "the keeper of the ancestors". That large book lists all the great squat names and heroes throughout time, and only the oldest squats can write in it. When a keeper ( the guy on top ) reaches the point in which he's ready to go (as the keepers are only the oldest and wisest of the squats, he signs his name in the book, blows the horn ( to draw attention to himself, so the enemy goes after him ) and he hops off and charges in. The spotlights I thought where needed cause squats spend a lot of time in ships, and clearing space hulks of nids, so more lights are always helpful.