Reagan was a fascinating President. A man who will be credited with winning the Cold War for sure. He seemed to embrace Gorbechev and made some great deals to reduce nuclear arms. But on the other hand, he committed a crime with Iran-Contra dealing with Iran for arms for the Contras. Also at the same time looking the other way at best while Noriega deals cocaine with the Cali Cartel but is also a so called valuable ally by the US. His domestic policy with ignoring the AIDS crisis for far too long was also a low point.
Like any President, there were highs and lows. However, Reagan's highs are quite high and his lows are quite low. But his real strength was that he did it all with a smile on his face and was quite charming. The guy could deliver a great speech which goes a long way. He also had very good people in his administration which helped him immensely.