Casting is definitely a personal preference thing, but that being said you'll also have a much more enjoyable experience if you learn all the different techniques. That versatility will become hugely beneficial when trying to fish untouched water in hard to access areas were only one style of cast will accommodate your area of access. With regards to the leader tangling with the main line, I would suggest focusing on finesse. Lots of guys whip their gear out there and it can work, but again, it won't always work. If you learn to get a gentle swing that uses the inertia of the gear to pull the line out you'll find yourself dealing with less tangles. This applies whether overhand or side, don't just flick it, focus on being smooth and placing the float on the water. My 2 cents.