The first thing that you might want to know is that I use Google Analytics. However, I don’t collect any of your personal data - even your IP is not stored as the anonymization feature is enabled.
However, I keep the IPs of the Website visitors in Nginx logs, just in case for tracking malicious activity. I store the Nginx logs for a maximum time of a week with a daily log rotation - after that time, all logs are deleted, so you don’t have to worry that your IP will be kept indefinitely.
I also use MailChimp for email subscriptions and Disqus for comments. You have to perform explicit actions to be involved anyhow with these services, and as a result, I might be able to see some of your personal data, such as an e-mail or an IP. I never distribute this data to any third party services, so this is not something you need to worry about. If you are still not happy about that and you have already subscribed or have written any comment, you can unsubscribe anytime using MailChimp, delete your Disqus comment or ask me to delete it.