hey everyone, so your job is to tell the best chapter, but here are somethings to know to make everyone understand. 1. you need proof for why, kinda like a debate of gamers 2. lore to prove it. from the salamander champion da'kir my favorite: the salamanders, because during the second war of armaggeddon, they took the fight to the green horde and threw them selves into the fray to protect civilians. also they has lots of flamethrowers and meltaguns, look at the land raider crusader redeemers.
The best chapter does not exist. It would be useless to have so many if it was the case. Each and every chapter has its pros and cons. You should change your title for "what is your favourite chapter", and in fact close your topic to go answer one of the many thread which already exist about that topic...
Salamanders and Space Wolves, because they fight to protect Humanity itself, not the Imperium, like true Space Marines.
Every chapter has too many exploits to brag about over 10k years of crushing enemies. It's a matter of opinion. All I can say is Ragnar Black-Man(as I like to call him) was my 1st intro into this whole universe so Space Wolves all the way. Logan Grimnar is also an older version of Wolverine which is pretty badass. Leman Russ also has the distinct honor of besting the Emperor in a drinking contest so bam.
I'm in the Space Wolves (Favorite Chapter) camp too, Read the Books, they are BA. I also like the Salamanders (Obviously, look at my pic), though I know less about the Salamanders lore. As for Best, Thats open for debate.
My personal favorite are the Blood Ravens. I like their approach to war, analyse the enemy, formulate a plan, then strike. I also love the un-god-emperorly amount of Librarians.