To clarify and deepen my understanding of the Sun, I pondered the following comparisons with similar and/or opposing cards. Maybe my comparisons will inspire you to make your own!
Sun vs. Moon
Sun: Light, day, spring and summer. Happiness, awareness, obviousness, possibly: superficiality.
Moon: Darkness, night, winter and autumn. Sadness, that of which we are only half- or even unaware; profoundness.
Ease
Sun: Ease in the sense of "the situation is bright and joyful",
or because we ignore anything dark.
Clover: Ease in the sense
that we take nothing seriously, or ease because we refuse to take on any
responsibilities.