Pet peeve: unsubscribe links that take me to a page asking for my personal information (usually my email address). I'll usually close those pages and report the email as spam.
If you know my email address, then put a token in the unsubscribe link so you can retrieve my address on your end, rather than making me retype it. If you don't know my email address -- maybe you are sending to a list, not to me -- then I consider you spam because you don't actually have the direct ability to remove me.
If you know my email address, then put a token in the unsubscribe link so you can retrieve my address on your end, rather than making me retype it. If you don't know my email address -- maybe you are sending to a list, not to me -- then I consider you spam because you don't actually have the direct ability to remove me.