Coffee is a magic elixir that promotes intelligent conversation, relaxation with friends while the bikes lean against the window at Starbucks, and warms my feelings on a cold day. The scent of it rivals that of a lovely woman on the pillow beside me........etc.etc.
I drink a cup or two per day, enjoy it thoroughly, and notice little impact on my physiology. I don't drink it to stay awake or as a fixation (sucking my thumb would be cheaper). Soft drinks I avoid.