Depends on your play style, honestly. I used to always wear down Eldrazzi decks with my green/white token/control/convoke deck because I built it for attrition. Efficient resource allocation, buffs, regeneration, banishment, and multirole creatures made it a mean deck but it took a while to get it to play at the right pace. Find what fits your style and make sure to maintain a good idea of what you're going up against. When my friends would bust out their skiver decks I made sure that whatever deck I was using could break their combos and keep resource/creature losses to a minimum. Basically, get a good idea of the decks out there and their traits. Build your deck accordingly while staying within your comfort zone.