Based on advice and viewing calculators, I purchased a 65"Sony Bravia OLED. I have had the TV for five months now and it still feels too big. 4K looks good (but too big) and letterboxed movies are ok, but everything else is too big and even 1080p doesn't look as sharp as I had expected. I am sitting 8.5''- 9'away from the screen. I suppose it's too late to return the 65", but I am considering getting a 55" because watching TV is not pleasurable currently.