This poem on what happiness is an attractive rhyme. The AA BB scheme goes all the way till the reader looks for more. Line endings are found on words that describe everyday scenes of simple pleasures.
"Sun setting on the hills
Those icy winter chills"

I find it special because the poet mixes the blissful and the mundane proving that anything that relaxes mind is happiness.
"Umbrellas in the rain
A big taxation gain"

Imagery-
Images are drawn from nature as well as man made world of umbrellas and taxes. It appeals to the eye and the mind as well. As the last line affirms, there are so many things that represent happiness provided we have the heart to perceive and appreciate.

Flow-
Flow comes with ease and naturally. Rhyme and rhythm add to it and make it a poem to remember.

Write on!