Not much to add, but I do think that the distinction of Marxism as a worldview/analytical framework from socialism or [insert tendency] as a political view. I'm definitely a Marxist, and it helps me see through western propaganda and understand the achievements of the USSR, PRC, Cuba, and so on, but I think it's important to take a critical look at the shortcomings of the l those countries and their leaders before making a practical application of their methods to my political involvement in my own community.

In short, this is a big reason why I don't jump into any particular tendency label with both feet.