Looking at photos of flowers that work well in containers or garden pots can give you ideas. Also, photos of flowers can just be so delicious to view, they can inspire ideas for gardening, or just give you a calming moment in your day.
Because almost any flower will grow in containers, choosing can be difficult. It mostly comes down to how much sun they will get and how willing you are to baby them. Some flowers are more drought and neglect tolerant than others. Some flowers will need full sun, but there are lots that will be fine in the shade.
Annuals will tend to bloom all season, while perennials tend to bloom once for a shorter amount of time.
In this photo gallery of flowers, I'll include annuals, perennials and try to give you an idea of the degree of difficulty it takes to grow them.
Here's a warning though: I tend to fall deeply and hopelessly in love with some flowers and photographing them.