Sun signs -- blah
I voted against every one of the twelve. Why? Because, other than getting people initially interested in Astrology, the focus on sun signs probably does more damage to the learning process than any other approach. People end up confusing a sign's meaning for the Sun's meaning -- that is quite wrong.
The Sun is an "integrating energy" as it brings out the expression of the other planets when it aspects them. It provides a seasonal marker that affects our cultural conditioning. It bestows energy and vitality through its house, sign and aspectual place in the chart. It reflects its energies through the Moon's position to shape the modulation of our emotions and intensity of our feelings. For Mercury it provides a reference point for perceiving the world and then categorizing and organizing our perceptions and responses. Just as Mercury becomes extenally or internally biased in its thinking and logical processes, the Sun counterpoints Saturn. Saturn, by representing the limits of perception relative to the Sun -- all beyond it is not seen, or is not seen directly through our personal relationships -- what is beyond is the greater social structures that seem to come out of nowhere and touch us for better or worse. Further, Saturn sets up a natural timing mechanism through its cycle of maturing experiences covering 29 years -- counterpointed by the Moon's progressed cycle of 29 years measuring our emotional experiences as they stay tied to our family conditioning or freed from that conditioning.
In all, the Sun is so much more other than its "sign" influence. It is power distributed, light alloted. Spend a year considering just the interrelationships between the Sun, Moon and Saturn and you'll learn about 75% of everything you need to know about astrology.
So, signs are out, the planets and their aspects are in -- in my opinion, of course. Dave