I would place musing at the top. For  me the decentralized apps are about fairness, quality and ease of  service. Based on these three parameters let me list my top 5 Dapps:

1. Musing

2. Busy

3. SteemPress

4. Steemit

5. DTube

I  know that putting Dtube and Steemit as last two is going to ruffle a  lot if feathers. I can only share what I have observed and I feel that  musing and busy rewards their quality users far more fairly and with  greater frequency. Not only that but the the good dapps are signified by  their ease of use and user friendliness.