If you already fly low wing aircraft, your next airplane will depend on the style of flying you intend to pursue. Aerobatics, Scale, Sport, or Fun Fly. Whatever style you intend to pursue, the aircraft will respond and behave in a manner dependant on its basic layout and design. Beyond the trainer stage symmetrical airfoils are preferred. Semi-symmetrical and flat bottomed airfoils have unpleasant inverted characteristics that may result in sudden stalls or uncommanded snaps.
Blunt airfoils are typically slower and allow more gentle stalls.
Excessive taper however, could produce tip stalling tendencies. Swept wings on models serve almost no purpose and should be avoided. Wing loading or weight can dictate whether your airplane flies like a butterfly or rock. Lower wing loadings allow aircraft to float but makes penetrating rough air more difficult. Higher wing loadings result in faster approaches and landings.