There are a lot of variables to consider when answering that question and I think a lot of them are subjective, but I'll give my very surface level opinion. I think carbon fiber is the easiest overall because it's very linear. It has a very consistent feel throughout all shots. Kevlar is much more dynamic and it can feel very soft when drinking but much more stiff feeling when driving the ball. Titanium is also dynamic but less so than Kevlar. However, it is significantly springier than carbon or Kevlar. But with that being said, I find the shogun and its titanium easier to control than the filth with its carbon, which is where the personal preference comes in.
That's a tough one to answer because there are very different paddles that cater to very different types of players. The Mach 2 Forza is a very soft control paddle that is very forgiving but lacks power/pop. The Shogun is a springy power paddle with a lot of pop, but isn't as forgiving on the control side. For me personally, I'd choose the Shogun because it fits my play style a bit better. The Fat Boy which I just reviewed is almost the perfect middle ground between those two paddles, so that could be a solid 3rd option for you.
