Best Answer
Advantages
Complex biome
Abundant precipitation
Warm all year
Individual flowering and fruiting seasons
Rapid bacterial decay
Species diversity – 40-100 different species in 1 hectacre
Disadvantages
Complex biome
shrinking
Low light intensity beneath the canopy
Any of the advantages could be a disadvantage, depending on what you are concentrating on - if you are interested in something requiring a dry climate, abundant rainfall would be a disadvantage