Aries rules the head so these people usually have many new ideas and will come up for you with a few in a matter of seconds. It can be said that their "head is on fire". Aries Mercury people learn fast and have logical thinking but can often overlook details. Their heads can be so full of thoughts and ideas that they can find it hard resting or falling asleep! Some sort of meditation or unwinding down is needed for them before bed.
Other people will inevitably feel rather slow to the Mercury in Aries person who likes to get to the point quickly and without needless circumnavigation. This is especially the case if the Sun is also placed in Aries. This is a direct, quick-thinking, fast talking and often tactless Mercury. There can be a capacity for instant decision-making and sometimes the quick arriving at solutions to problems. On the downside, negotiating and seeing another’s point of view may not be so easy. There can also be a tendency to jump to conclusions prematurely and to speak for or make decisions for others. In classrooms and communicative situations this person cannot wait to give an answer and is competing to say “I know that!”
Frequently this is the person who writes in books or underlines or highlights the main points (thus putting their unique stamp on the text).
Friendships are built and broken fast, with little sentimentality! They can attract more youthful and unique friends.