Like I said, this thread is a big list of emotion buzzwords that are here to help you find what you are trying to say when you are describing the effects you observe.
But first: Plutchik and his big wheel of emotion. If only we could make this into some sort of flash app where users could click to rate where they feel. Maybe we can use the wheel on the product page if we can refine it enough?
Now on to the list:
Love
Affection
Adoration, fondness, liking, attraction, caring, tenderness, compassion, sentimentality
Lust/Sexual desire
Arousal, desire, lust, passion, infatuation
Longing
Longing
Joy
Cheerfulness
Amusement, bliss, cheerfulness, gaiety, glee, jolliness, joviality, joy, delight, enjoyment, gladness, happiness, jubilation, elation, satisfaction, ecstasy, euphoria
Zest
Enthusiasm, zeal, zest, excitement, thrill, exhilaration
Contentment
Contentment, pleasure
Pride
Pride, triumph
Optimism
Eagerness, hope, optimism
Enthrallment
Enthrallment, rapture
Relief
Relief
Surprise
Surprise
Amazement, surprise, astonishment
Anger
Irritation
Aggravation, irritation, agitation, annoyance, grouchiness, grumpiness
Exasperation
Exasperation, frustration
Rage
Anger, rage, outrage, fury, wrath, hostility, ferocity, bitterness, hate, scorn, spite, vengefulness, dislike, resentment
Disgust
Disgust, revulsion, contempt, loathing
Envy
Envy, jealousy
Torment
Torment
Sadness
Suffering
Agony, suffering, hurt, anguish
Sadness
Depression, despair, hopelessness, gloom, glumness, sadness, unhappiness, grief, sorrow, woe, misery, melancholy
Disappointment
Dismay, disappointment, displeasure
Shame
Guilt, shame, regret, remorse
Neglect
Alienation, isolation, neglect, loneliness, rejection, homesickness, defeat, dejection, insecurity, embarrassment, humiliation, insult
Sympathy
Pity, sympathy
Fear
Horror
Alarm, shock, fear, fright, horror, terror, panic, hysteria, mortification
Nervousness
Anxiety, nervousness, tenseness, uneasiness, apprehension, worry, distress, dread
I know there’s about a billion more, but I hope this helps!