I'm so passionate about English writing/proofreading/review/editing that it has become a way of life for me. Irrespective of the source of content, grammatical/spelling/punctuation errors if exist, hardly evade my attention, and I voluntary bring them to the notice of the persons concerned, as a constructive feedback. At office, even my superiors used to get the email-content proofread by me for important emails, before sending to the clients.
I've written many poems as well in English.
Thanks,
Ganesh