Expect the unexpected. Don't concern yourself with whether they will be pleasant to look at. Many things we see in this world are not pleasant, but we look anyway. They are there whether you can see them or not. Would you rather see or be ignorant to what is around you? Some would rather be ignorant. Most would rather see, so that they are more aware of their surroundings.
I personally could always see. So I can't say from a personal perspective what is better or not. But energy is energy, to see spirits is to see energy. Our magick is made of energy and to see your circle, protections, or the aura of your tools and crystals is invaluable. To see the energy of a person is to learn about them without ever speaking with them.
Clairaudience, clairsentience, and clairvoyance are all interconnected. When you see the energy, you can feel the energy better, get a sense of what it means. When you see a spirit you can hear it better. Why? Because the biggest reason we do not experience these things is because our minds are not open to them. We assume it is unreachable or impossible, and it closes us off. Seeing spirits...well, seeing is believing! And when we see them we are more open to experiencing all that the spiritual world has to offer. It no longer seems so impossible.