"Do you think my online name is very attractive?"

If you want to express this in a more natural English sentence, it could be: "Is my username really appealing to you?"

If you are asking for multiple English sentences about this topic, here are a few:

1. I've put a lot of thought into my online name, and I hope people find it intriguing.
2. Do you believe that an interesting online name can leave a deep impression on others?
3. My username is designed to be memorable; does it work for you?
4. Is there something particularly captivating about my web nickname that stands out to you?