iMessages? Never bothered me, or anyone I know, most people I converse with use WhatsApp anyway, most of my family are iPhone users but for the family group we have always used WhatsApp.
I've had some kickback from people including 1 saying he just won't message if I'm not on imessage because he hates whatsapp so much. Well ok bud your choice mate
BUT when I look at it, although I live in imessage on my iphone, most of the messages in were actually sms/texts! from multi factor auth, from websites, from credit card companies sending verification texts and so on. So there aren't actually THAT many pure blue bubble conversations and most of those are already on my whatsapp.