I am sorry, what am I supposed to be doing?
Sorry XP For some reason, I had read your post like you were interested in GMing it. XP I apologize, my bad.
Honestly, I think a lot of people are going to be taking devil fruits. And I don't mind it, in fact, having a crew of 'em sounds epic! However, we have to remember to have some enemies with enough strength to counter-balance our epicness.
Taken from the wiki, the logia types.
Moku Moku no Mi (Smoke-Smoke Fruit/Plume-Plume Fruit): Element of smoke.
Mera Mera no Mi (Flare-Flare Fruit/Flame-Flame Fruit): Element of fire.
Suna Suna no Mi ( Sand-Sand Fruit): Element of sand.
Goro Goro no Mi ( Rumble-Rumble Fruit): Element of lightning.
Hie Hie no Mi (Chilly-Chilly Fruit/Ice-Ice Fruit): Element of ice.
Yami Yami no Mi (Dark-Dark Fruit): Element of darkness.
Pika Pika no Mi (Glint-Glint Fruit/Light-Light Fruit): Element of light.
Magu Magu no Mi (Magma-Magma Fruit): Element of magma.
Numa Numa no Mi (Swamp-Swamp Fruit): Element of swamp.
Gasu Gasu no Mi (Gas-Gas Fruit): Element of gas.
Yuki Yuki no Mi ( Snow-Snow Fruit): Element of snow.
Now, with this list of canon in mind, maybe we could decide which ones to take and which to leave out. That being said, it's really up to the GM to decide.