Orbs, Energies and Spirits
If you are now seeing things more often then you may be going through a spiritual change. Your abilities may be getting stronger. I have found personally that for me that it generally comes in waves and I see things more often in the fall through January. But I do see what looks like a black orb near me quite often. I don't feel an emotional energy from it, it's just there. I have also seen many different multi-colored orbs in the middle of the night. And I've seen, heard, and felt plenty of ghosts.
In case you don't already know this I thought I'd share that spirits have to come a long way to see us and either don't present at all or come through as orbs or orb-like. Sometimes if one has a strong personal connection to the spirit they will present in full form. But it takes so much energy that it is rare. Ghosts on the other hand are deceased people still tied to the earth (we call them earth bound). They are much easier to see and present often in clear full form or as an outline. And both ghosts & spirits find it easy to visit you in your dreams so you'll want to be on the look out for that (particularly right after someone passes away).
There is a theory about soul groups that I like and believe in. And it basically says that many of the people in our lives have been with us in our past lives. For example, your Dad could have been your best friend in a past life, your mother could have been your brother etc... If you feel the energy of two dead people you know who didn't know each other, it is either that they are both happy to visit you, or that they do actually know each other on a soul level and are going for a walk together to visit you. But lucky you. That is a fairly rare skill. Enjoy it and journal your experiences so that you can notice patterns.