Okay I am sure that a lot of threads are made for strings and questions about them. I am wanting to post up several types here with a description and for those of you that have tried them out maybe give me some feedback on what you thought of them.
( descriptions from yoyoguy.com)
Ok Angel Hair
A new string we are bringing to the market. This one is very strange. When you get it it’s stiff like plastic. Heck it feels like fishing line. It’s so stiff in fact that at first you will have a hard time keeping the loop on your finger. But play with it, break it in. This string needs a little love before it will love you back. When it breaks in it will loosen up and become and amazing player. It holds a loop for whip catches like nothing we’ve ever seen, it’s slick, it’s fast, and it’s great for keeping a yo-yo at a zero response level. Here is the real kicker. The guys at Infinite Illusions have been playing with this stuff for about a month now. Their strings are lasting not hours, not days but weeks. As usual your mileage may vary, but try this string. We think you’ll love it, and do expect it to take a while before it breaks in. It is worth the wait. You must know how to do a bind to take advantage of this string.
Alchemy
This string is similar to Angel Hair string in the way it needs to be broken in, but it breaks in faster, and it’s smooth, slick and strong.
Available in many very bright colors. Purple, Green, Orange, Yellow, White and a Pink with a hint of Orange.
Yoyogstring ( description from yoyogstring.com )
yoyoGstring is the premier handmade yoyo string. With over 3 years of hand crafted experience, bundles of G-String sold to players worldwide and more than 150,000 G-Strings personally twisted I am confident you will find the yoyoGstring that is right for you. Everyone from the complete beginner to seasoned player can enjoy yoyoGstring.
Unmatched performance along with high quality materials in its construction truly set yoyoGstring apart. Each string is handmade with care and attention to detail at a level that is seldom seen in todays world of factory floors and foreign mass production. Don’t buy a yoyo string that is mass produced. With yoyoGstring you truly do get what you pay for.
And then www.yoyoexpert.com strings
Good Yo-Yo string is essential if you want to get the most out of your yo-yo. Luckily we have come a far way from the basic cotton strings your grandfathers had. All string is sold in packs of 100. For looping tricks and beginner to intermediate string tricks YoYoExpert Recommends Slick 6 and for more advanced string tricks the 100% polyester - but a lot of times everyone has their own preference so find what works for you.
Ok so which do you all prefer I currently use yoyoexperts but they only last me like a good hour of play and thats it. 
