If magic was real what spell would you cast?
The specific spell one would choose to cast would depend on their individual needs and desires, and the rules and limitations of the magical world in which they exist. I could suggest:

1. Healing Spell: A spell to heal any physical or emotional pain and injuries, restoring a person's health and vitality.

2. Invisibility Spell: A spell that makes the caster invisible, allowing them to move about undetected and observe their surroundings without being seen.

3. Flight Spell: A spell that allows the caster to fly, freeing them from the limitations of gravity and enabling them to move through the air with ease.

4. Teleportation Spell: A spell that enables the caster to move instantly from one location to another, without the need for physical travel.

5. Elemental Spell: A spell that harnesses the power of the elements, such as fire, water, earth, and air, to achieve various magical effects.
Those are great suggestions. If I had to choose just one, I think I would choose the ability to teleport. The convenience and flexibility of being able to instantly travel to any location would be incredibly useful in many different situations.
That's a good choice! If you don't need to go very far, the ability to fly might be more convenient for every day activities (like home repair), since it would also give you extra vertical mobility.