I was bored so I typed this up. I'm an Aquarius, btw:

Aries - You have just gotten in an argument with a girlfriend or boyfriend and they dumped you due to anger issues. You make yourself a bowl of ice cream and cry into it. Scalding hot tears run down your muzzle and jaw, dripping off your chin and melt the ice cream with a combination of salt and hot temperature as you sob angrily into the bowl.
Keyword: Run

Taurus - You just got fired from your job because you kept slacking on it. When you get home, you take a nice hot shower and let it all out. The water mixes with the large, bitter tears streaming down your muzzle as you hang your head. You watch as the mixture of shower water and salty tears drip off your nose and get washed down the drain.
Keyword: Stream

Gemini - Someone just told you a joke that you find completely hilarious. You're laughing so hard that your eyes tear up with warm tears of laughter which slide down your muzzle and tickle your nostril, causing you to sneeze which only makes you laugh even harder and more tears slide down your face.
Keyword: Slide

Cancer - You and a friend go to a chick flick type movie and throughout it, you're bawling uncontrollably with tears dripping down your muzzle and cheeks alike, drenching every square inch of fur or scale with their wetness. Your tears make the popcorn soggy and saltier than ever and you're asked to leave for crying too loud. Of course, you cry over getting kicked out as well.
Keyword: Drip

Leo - You're looking at yourself in the mirror and reflecting back on good times. The nostalgia rush hits you and you suddenly start crying with warm tears flowing down your furry face. You cry loudly but still look handsome as sparkling tears drip elegantly off your whiskers and onto the counter like priceless diamonds falling from your eyes.
Keyword: Flow

Virgo - You are walking downtown when a horrible stench hits you so badly your eyes water up. You rush to the nearest bathroom and throw up in the toilet, icy cold tears trailing down the side of your muzzle and dripping off your chin instead of your nose. The tears are a result of gag reflex and reaction to the overall stench.
Keyword: Trail

Libra - Two of your closest friends have gotten into a huge argument. You try your best to resolve things but the fighting gets more heated between the two. Finally having had enough, you retire to your car and hang your head. You allow a single hot tear to roll down your muzzle and settle on the end of your nose before licking it away with your long tongue, savoring its bitter flavor.
Keyword: Roll

Scorpio - You've been recently dumped because of being too controlling and intense. You try to get to sleep but have trouble doing so. You then lock yourself in the bathroom and cry for a good 10 minutes. An ugly cry with hot tears coursing down your muzzle and mixing with your snot. You have a mountain off tissues piled up at your feet. Afterwards, you plot revenge.
Keyword: Course

Sagittarius - You are delivering a good friend's eulogy at a funeral and tear up as you remember the good times. A few bittersweet tears fall down the bridge of your muzzle but you quickly wipe their away with your paws and tail before laughing about remembering all the good times.
Keyword: Fall

Capricorn - You barely ever cry but recently got news of the death of a family member. At the funeral, you are completely stoic but afterwards, you begin crying a storm in front of everyone. Cold, salty tears pour down your muzzle like a monsoon and pool on the table as you sob like there's no tomorrow. After about 2 hours of crying, your family nuzzles you and licks your tears from your muzzle to console you.
Keyword: Pour

Aquarius - Someone is being bullied by a gang for being different. You want to step in but don't act because you're outnumbered. You quietly weep and stare at the floor as you listen to the abuse. A river of warm, silent tears streak down your muzzle, leaving salty tracks from the corners of your eyes to the tip of your nose. A few tears drip off your nose, hitting the floor and you drag your paw across your tear-streaked muzzle and compose yourself before calling for help.
Keyword: Streak

Pisces - You were recently a victim of bullying and someone calling you a space case. They tore up your art in front of your face, insulting you. You're now sitting by a serene pond and several small, cold tears are trickling down your muzzle and dripping from your whiskers or nostrils and making ripples in the water as you sadly gaze at your reflection.
Keyword: Trickle