Okay, here's a quick blurb on all the ones that are available<br/><br/>Black Templars - Fanatical crusaders, big on melee, hate psykers<br/>Blood Angels - Favour close assault, can suffer from frenzy. Fairly nice people apart from that<br/>Dark Angels - First legion, lots of battle honours. Dark secrets that they hide from everyone, even most of their own chapter. Doesn't play well with elements of the Inquisition<br/>Space Wolves - Space vikings.<br/>Storm Wardens - Sort of Scottish I think. Don't really know much about them<br/>Ultramarines - You know the term 'by the book'? Their Primarch wrote the book in question.<br/>Imperial Fists - Very good in defense.<br/>Iron Hands - Good if you want to play a techmarine. Fond of cybernetic bits, since 'the flesh is weak'<br/>Raven Guard - Stealth experts.<br/>Salamanders - Probably the closest to the humanity they come from. Pyromaniacs.<br/>White Scars - Space Mongols, but replace horses with bikes, or even better, jet bikes. Fond of hit and run tactics<br/>Blood Ravens - Lots of librarians. Big into the psychics.<br/>Red Scorpions - Don't know much about them<br/>Marines Errant - Zero G specialists<br/>Flesh Tearers - Blood Angel successor chapter. Even more prone to frenzy and wipe out everything in sight.<br/>Crimsons Fists - Imperial Fist successors, hate orks.<br/>Raptors - Fond of long range and sniping<br/>Carcharodons (Space Sharks) - Another chapter who like it up close and personal.<br/><br/>You can also design your own rules for a DIY chapter