A previous thread seems to have forgotten the huge amount of time to invest into most of the VN’s out there. ‘Muv-Luv Alternative’ already reads like ‘War and Peace’ in novel length, and ‘The Fruit of Grisaia’ already is a trilogy of huge games. That’s why I prefer to read kinetic novels without any choice in the first place, or even shorter VNs of very good quality instead of getting stuck in huge games that would take a casual player weeks to even months to complete.
Many visual novels are novels. ‘Muv-Luv Alternative’ is like reading ‘War and Peace’ twice. Even ‘The Fruit of Grisaia’ trilogy consists of three very long games. So, unless you are a very dedicated reader, you have to prepare for a very long time to read all the visual novels you want to. That’s why I prefer kinetic novels (no choices) or shorter novels (even if they are not as good). For example, ‘Planetarian: The Reverie of a Little Planet’ (a 5-hour long kinetic novel that is set in a post-apocalyptic world where a museum robot recounts the events leading up to the apocalypse) and ‘Emily is Away’ (a nostalgic simulation of early 2000s chat clients, with a powerful and concise story) are much better examples of the medium than the typical harem-style game with 100 hours of gameplay. So, if you are new to the medium, I would recommend starting with a shorter, highly-rated game, as your ‘top’ game might be the one you actually finish.