Ike and Samus, no competition from the rest. Samus is unique in her playstyle to me. You have to save your projectiles for just the right moment, and they can be devastating and satisfying. Her bombs can throw off people waiting for you to fall into their attacks. Most of her attacks, in air or on ground, are STRONG. While we're talking about STRONG, Ike. Obviously. Dude's a powerhouse. EVERY attack can kill, and all have their specific uses. It's so satisfying to hit a fast character with one powerful smash attack and watch him go flying. It feels like you're truly outsmarting your opponent when you use a character as slow as Ike. Plus, the counter is always fun ;)