But I usually use strings from D'Addario Pro-Arte. They have various types and I have found the new carbon strings to be very good. Here is a little review of them:
That is the latest string technology, but a lot of string players prefer a much older technology: strings made from gut:
If you play a lot, several hours a day, guitar strings will only last a couple of weeks and that is due largely to being mashed on the frets. Pretty soon the wire will wear through on the 4th string and the clarity of pitch will start to decay on the trebles because they are no longer of uniform thickness. After a few years you get expert at changing strings! Here is a pretty good video on the subject.
Yes, I also melt the end of the treble strings to form a little ball so they won't slip, but I do it because the way my bridge is designed it is really necessary:
Unlike the usual bridge, the strings are held only with the knot in the end. He uses a string-winder, which is ok. I don't, because I don't wind as much on as he does--when I put the new string on I pull all the extra through. I never saw the reason to wind all the extra on so I don't use a lot of slack as he does. If you overlap it in the pegbox it won't slip.
D'Addario Pro-Arte are fine modern strings, but sometimes, especially when playing a lot of early music, I like the sound and feel of the older Savarez red card strings with their textured trebles. These almost feel like gut and give quite a different effect. Anyway, here is what my guitar sounds like with Pro-Arte strings. I think this was the older type, not the carbon ones. This is Las Abejas (The Bees) by Agustín Barrios, a nice virtuoso showpiece: