Hi avit. Your eyes and your room mean that what is recommended by another may be no good to you. Otherwise, why is there so much picture and sound adjustment available on TVs? To help you set up your TV to your own preference try this;
and if you have a suitable DVD with THX go into the language settings and select the THX logo and adjust your TV based on those recommendations for the allegedly best DVD picture and sound. But if you prefer more colour, less brightness etc, so be it.