The way I see it, there is nothing positive or negative. Essentially, we (our energy systems) react positively or negatively to various things, and even that changes with time.
For example, are almonds negative? Yes, for people who react negatively to it due to intolerance, but not for many others.
While dealing with positive/negative energies as such is good to address the symptoms temporarily, the long-term goal should be to align with Neutrality (borrowing the term from Dr. Yuen). There is a notion that to be happy (which is the goal of everything we do right?) - (a) We need to achieve a bunch of things that are considered positive (b) Stay away from a bunch of other things that are considered negative - so says conventional wisdom. Now if we design our lives around doing “positive” things and avoiding “negative” things, the definitions of which change constantly, are we sure we will be happy and balanced?
Being aligned with Neutrality would be to rise above it all, to be not affected energetically by either things perceived as positive or negative. Even supposedly positive things/emotions can imbalance us. Energy is energy - at the core, it cannot be negative or positive, but the reaction or judgment to it is what makes it as such.
When one stays in a Neutral state, there is no need to block, shield, remove “negative” energies, or do any kind of acrobatics to attract the “positive” energies. Sometimes, entertaining a strong belief (/fear) that we need to block/shield against a certain energy/energetic pattern is what fuels that particular energy, manifesting an attack (I write this because many folks on this forum are constantly worried about entity attacks and actually manifest them). Not dwelling in a space of fear (block, shield, expel, avoid attack, remove demons) or lack (manifest, attract this or that, enhance this, increase that) fixes problems a lot faster than dwelling in such a place and then trying to fix issues.
Love energy is one way to be neutral (as long as it is not conditional and not restricted to an emotion), Mindfulness is another way. The field of neutrality is another way to look at Non-duality or Advaita where things are present, many many things, many many energies, we just exist in harmony with them all by realizing that at the core, it is the same energy that appears in myriad apparitions. The Vibration series should eventually get us into this Neutrality zone.