Why was Christianity so appealing?

So exactly why is Christianity so appealing? There are two major answers to this question. The draw of the promise of having eternal life and the sense of community. In the early days of Christianity one usually had a very short life expectancy. So when they heard of Christianity and that if you love Jesus, you will go to an after life of happiness when you die. This would sound very appealing to a peasant for example who would probably live up to only forty or fifty years. One of the popular religions at the time was the Greek Gods one. In that religion, if you died, you would end up in the under world no matter if you were a good or bad person. In Christianity you supposedly have a choice.
The second reason Christianity was appealing was the sense of community. God already loved you no matter what and if you loved Jesus you were automatically part of a community. You and everyone else in the village or city would all congregate at the local synagogue and would talk and pray and love Jesus. It was all friends and everyone was very accepting.