Most recruiters are terrible (as far as spam mails go) but every once in a while I get a well written email, actually applicable to my skills, with some persona

Most recruiters are terrible (as far as spam mails go) but every once in a while I get a well written email, actually applicable to my skills, with some personal touch, and most importantly explains the job I'd be doing and which company they're recruiting for. When I get a "good" one like that I like to reply and thank them for not being a shitty recruiter and that I appreciate them sharing enough details for me to understand the role they're trying to fill. But, that's like 1 in 100 at most, a majority of the messages I get are "We're looking for an iPhone/Android/Xbox developer for a new secret project at a secret company!"