Why you should use vanity address?
If you're tired of the random, cryptic addresses generated by regular Deep Onion client, you can use vanitygen-plus to create a more personalized address.
For example I customized my DeepOnion address to DonioN7gV9qjCZWfdKxGXDYdrhLoZMDVV5
How to generate a DeepOnion personalized vanity address?
Recently I made a pull request to https://github.com/exploitagency/vanitygen-plus to include support for DeepOnion
Until it is packed into release, you should follow instructions for generating DeepOnion address as follows in https://github.com/exploitagency/vanitygen-plus#getting-started
When the github repository is updated with new release I will post a new post with more convenient way of generating vanity DeepOnion address
How to use vanity address?
After you generate your custom vanity address, import generated private keys to your DeepOnion wallet by opening command line interface in your DeepOnion by issuing command "importprivkey -your DeepOnion private key-".
More in depth but the same principle as written in https://en.bitcoin.it/wiki/How_to_import_private_keys
If you were successful generating your custom vanity address,
Donate some ONIONS to DonioN7gV9qjCZWfdKxGXDYdrhLoZMDVV5