Jason, look to your watering methods for answers to your phal/sympodial question. The orchids with and without pseudobulbs store moisture in their own ways. Phals have succulent roots which need to dry a little between watering, but don't take to long dry spells. Phal leaves are also succulent and will become weak and wrinkled due to loss of roots, the result of overwatering, and also because of lack of carbon dioxide uptake caused by extended under watering.
Dr. Yin-Tung Wang is a Texas A&M floriculturist at the Weslaco Center and is a consultant to the orchid industry. I have found the following series of articles on Phalaenopsis culture to be quite interesting.
The second article specifically speaks to the root of the matter and discusses proper watering.