Every person is going to have different opinions as to what distro works best for them. What exactly are you looking for in an ideal operating system?

Best would be to try different ones and see which one works best for you, but if I had more of an idea of what you're looking for and what kind of hardware you're using, I'd be able to recommend some distros to try out.

Are you a power user? Do you prefer stability or always having the latest software? Do you value ease of use or do you consider yourself more of a power user? Do you want to learn how to use the Terminal, or whould you rather avoid it and use graphical tools instead?

Also different desktop environments, even on the same distro will provide vastly different experiences.