I do no gi most of the time. I'm the kind of guy who doesn't use strength... cause I don't have it, although I'm not that little (83 kg, 1.83 m). Plus, I have a really bad back problem and bridiging rarely comes into my game. I've noticed that using the gi makes me (and other people) use more strength esp. when it comes to holding the grips. There is no part in my no gi game where I use the amount of strength (although I'm not holding for dear life) that I use in holding for ex. the sleeve when playing spider. The same thing I felt when I rolled both gi and no gi with a brown from Gracie Barra (I'm a blue, btw). In no gi he was flowing more and not using the strength to pull me (he was using a lot the spider). And one more ex. comes in my mind: the fingers of the majority of the "gi" guys. They got those "damaged" fingers from using grips. Do you guys ever felt the same?