Personal property is respected under communism. Your possessions are yours. Countries like China, the DPRK, Vietnam, and Cuba have some of the highest home ownership rates in the world, for example. It’s productive private property - the means of production - that are limited. That means things like factories, farmland, etc. But even with productive private property, what we have learned over the last century is that socialism is a transition from the old to the new. And practically speaking, trying to completely eliminate any sort of small business emerging isn’t particularly helpful in the early stages of that transition.

Regarding self-expression, I don’t see why that would be limited under communism. Go to China now and see that people express themselves in just as many ways as other places, for example. I guess if you are talking about collective versus individualist values… we already have some fully capitalist societies that are more collectivist than others (say, Japan versus the USA). It appears to me in those instances, collectivism is not mutually exclusive with self-expression, no?