The Sign They Should Be:

Tom:
Sagittarius
Sagittariuses are lucky by nature, so they usually display a cheerful and optimistic disposition. Their inherent curiosity keeps them more interested in what will happen tomorrow rather than focuses on the mistakes of today. A state of constant change is a delight for them. Sagitarriuses are extremely independent, truly free spirits and yet, they are the nicest of all the zodiac signs. Sagitarriuses are kind, openhearted souls who do not expect anything in return when helping a friend. There are no hidden secrets to a Sagittarius - what you see is what you get. Creative, clever, straightforward, congenial - all these traits describe Sagittarius.
Sagittariuses can often be seen as too talkative and pushy because of their extroverted ways. Sometimes their frankness is seen as being too blunt or impatient. Because of their desire for change, Sagittariuses may have a hard time committing to a relationship for very long. A Sagittarius's carefree nature may also lead them to be careless.
The friendliest of all signs, a Sagittarius can be your best friend, but their roaming nature may not make them a good lover. They are however, fun loving, charming, and honest. Their creative minds will amaze you and keep you thoroughly entertained.

Brandon:
Cancer
Cancers can seem easygoing, sympathetic, and patient one minute, then cranky and irritable the next. Because of this ability to make a sudden change, Cancer is the least predictable of all signs. They are ruled by the moon and have water as their element, so their mood swings can be compared to the turbulence of the shifting tides. If they feel they need to, they will retreat to their own emotional shell to keep others out. However, Cancers can be very sympathetic to others and readily show their affection. Cancers are also very emotional and sensitive, which may be why they are so empathetic towards others.

Cancers need a lot of attention due to their unpredictable character, but if you give them the support they need, they will offer you their undying loyalty and love. Once you have won their trust, nothing anyone else can say will sway them against you.
Cancers are very intuitive, almost to the point of being psychic. They are able to spot even the smallest change in another's behavior, so it is hard to deceive them. They are very insightful and most have a photographic memory. The combination of these two skills plus their excellent observation skills makes them very aware of the ulterior motives of others.
Cancers are often seen as moody, cranky, and unpredictable. Because of their sensitivity, they can be seen as overemotional and touchy, almost to the point of being clingy. They tend to be possessive of those they have allowed in their world. Cancers can shut people out if they feel uncomfortable and "going into their shell" is seen as being introverted.

Johnathon:
Aries are often pioneers in both thought and action. They do not shy away from challenges but welcome them with open arms. Therefore, Aries are often seen as courageous, responsible leaders. Just like the battling ram, they live life head first with a headstrong nature. Aries love to be the leaders, but do not like to follow someone else's lead. And while they welcome challenges, if they do not see results quickly enough, they may quickly decide to move on. They are also sudden to desert a cause if questioned about their leadership. Aries are very good at starting things, but often may leave tasks unfinished.

The energy and aggressiveness that makes Aries such incredible leaders can also work against them. They can be argumentative and headstrong. Their quick temper may flair up from times to time and if you anger them, they often hold grudges.