The nice thing is that we do have a choice. Everyone thinks a little different, so what appeals to one person doesn't appeal to another and vice versa. Both Plesk and cPanel have their Pros and cons. I do think that cPanel for the end user offers advantages over Plesk since to my knowledge Plesk does not offer the ability of addon domains. As far as the backend for root, Plesk is more intuitive even though it is lacking in functionality compared to WHM. As I have been using WHM more I like what it does compared to Plesk even though Plesk is a bit easier to use. And that's only my humble opinion, your opinion is valuable also.