There is no such thing as "the 'best' type of art form." The reason that various art forms exist is that various types of individuals exist and we all express ourselves differently. Some people cannot connect with painting or other visual arts, but they may be innate writers and can convey emotions, ideas, and messages through their writing. Similarly, there are people who find (figurative) refuge in theater arts because they find that immersing themselves in another character and entering into a different world allows them a freedom they never knew in the "real" world - but they may not be able to express themselves through painting or writing - or fashion, photography, poetry, ceramics, or sculpture. A precious few are truly, genuinely gifted in multiple fields, while some only dedicate themselves to one, but there is no "best" art form.