It’s funny because you can kinda judge people on the chapter they play. Black Templars are chuds most of the time, Salamanders are the opposite.
Similarly, I find a lot of left wing homies play Imperial Guard (it me, I like all the little guys) but the Guard players with the worst politics invariably play Krieg
I think the presence of space marines draws away the people looking for power fantasies of various kinds (from your black templars to your salamanders) and leaves the people who’s fantasy is either ordering people to their deaths (Krieg) or standing tall with your comrades against overwhelming odds (most other regiments). Of course, the less said about the fantasies of Praetorian players, the better.
I like Black Templars because they play like Space Wolves lore claims they fight like.
I play Dark Angels because they’re canonically as sick of Space Wolves as I am.
Also, one of the few loyalist chapters that have a weakness that both matters and is the direct fault of their own Primarch.
Can they just be normal?
I think being in character for WH40K pretty much predisposes you can’t actually be normal