Between the three lenses that you started out considering, I would narrow it down to the 35mm and 56mm. The 60mm is far too slow to focus, limiting its usefulness. I believe that you already discovered this with your trial. The 35mm is a more flexible focal length. I bought it at the same time as the 56mm and have been surprised by how much I use the 35 instead. The 56mm f/1.2 is the best lens of the bunch though and extremely sharp. Working in low light with this lens was a revelation for me. If you enjoy closeups and especially portraits or candid shots, I would recommend the 56mm as a supplement to your 18-55 since the zoom gives you f/4 at the long end. If you are looking to leave the zoom at home and work exclusively with a single prime lens, I would go for the 35mm. The good news is that both of these lenses are incredible!