I absolutely adore the level to which you can dress up your character in the dark souls games, with like 100 pieces of armor for each of 4 slots, there's a lot of possibility and you can change your armor frequently and with little penalty (unlike in many MMOs). Additionally, being able to fully see your character at all times makes character customization feel more important than in first person or simplified 2d games. Lastly, the character creator with sliders for changing features rather than just presets is an aspect that I feel is especially important. If there's any game that you feel fits with these 3 main criteria, please share it.

Games that I feel are similar but already common knowledge: elder scrolls, dragon's dogma, monster hunter