Back then you didn't had any free right of speech, you didn't had the right to make a business, work for yourself and make money as many as you like.
Of course, others still regret it because it was a safer place for every individual, everybody worked (there was no such thing as unemployment), received cheap houses and the payment was ok for every individual (the problem was that the option of buying things was very limited
)
The ones that regret communism are, in general, the ones from the country villages, the uneducated ones because the rest of the class didn't want to earn as much as as peasant or an industrial worker, the wealth was redistributed so that everyone, regards their professional skill, knowledge and experience , would be paid the same.