Re: What Devil Fruit would you want use
My dream fruit: Enel's Fruit. Moving at the speed of light, creating thunder which is uber cool and powerful, and one ability Enel hasn't discovered yet is actually controlling human's perspective, because perception of five senses, and all actions including thinking, within the nerve system depends on the electric currents in the nerves system. If Enel can control that, he can make people feel eternal pain just by stimulating the electrical current inside of them. And if your perception tells you that you're "stabbed in the eyeball by a thug with rusted knife", your eyes will start bleeding and tear themselves apart because of the chemical reactions happened within the body as the sign that the body obeys the mind. What an omni-pawning fruit.
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Trying to imagine a fruit...
Name: Density Density Fruit
Type: Paramecia
Power: Ability to increase or decrease the molecular density of all things the fruit user touches, and also molecular density of the fruit user's own body. Increasing molecular density while maintaining own body size is done by absorbing the molecules of the surrounding environment, even living beings nearby.
Main use:
you can create a shield out of water, soft materials and even thin air when you activate this ability, and also you can increase your own molecular density while at the same time absorbing the environment's molecules needed for you to harden yourself, resulting in hardening of your own body at will whether to defend against physical attacks, or to attack the enemy physically. And on the other side, you can lower the density of yout molecule sothat you can become like liquid, and if you push it with even more concentration and training, your body can be like that of a Logia fruit user, like gas, smoke or wind at this matter.
And if the user is already at master's level of the control over the fruit's utility, the user can change density instantly, to the point where the user will have no physical body to weaponry attack, or to the point where the user's molecular density is infinitely high where nothing can scratch it anymore, even Logia elements, or so sharp that it can cut even molecules of elements themselves, like Fire (Hydrogen, Oxygen), Thunder (Neutron, Proton) or even Light (Photon molecule).
Disadvantage: If you increase your molecular density by absorbing the environment's molecules recklessly, you'll put your friends in danger because you can kill them by absorbing their molecules accidentally. And, if you lower your molecular density to the point of no return, your molecules will scatter and you'll vanish instantly. Instant death.
Weakness: Weakness of Paramecia fruit user, and Wind (if you're at low molecular density or "Gas" state, because opposing a Kaze Kaze No Mi user when you're at gas is the same as giving him absolute control of your own body, directional movements etc. Instant defeat.)