It's okay to be a bit jealous of your own site; it's okay to want to keep those high quality questions for your site. Other SE sites, such as StackOverflowStackOverflow, Programmers, Computer Science, and Theoretical Computer Science, have overlap with each other. While that can be somewhat confusing to new visitors, it provides a richer experience as each community develops their own perspective in answering questions. It can also lead to interesting social experiments that explore site differences.
replaced http://cstheory.stackexchange.com/ with https://cstheory.stackexchange.com/
replaced http://programmers.stackexchange.com/ with https://softwareengineering.stackexchange.com/
replaced http://meta.stackexchange.com/ with https://meta.stackexchange.com/