Classical guitar for repertoire of all periods is sometimes critically viewed: Torres and post-Torres style modern guitars (with their fan-bracing and design) have a thick and strong tone, very suitable for modern-era repertoire. However, they are considered to emphasize the fundamental too heavily (at the expense of overtone partials) for earlier repertoire (Classical/Romantic: Carulli, Sor, Giuliani, Mertz, ...; Baroque: de Visee, ...; etc.). "Andrés Segovia presented the Spanish guitar as a versatile model for all playing styles" to the extent, that still today, "many guitarists have tunnel-vision of the world of the guitar, coming from the modern Segovia tradition". While fan-braced modern
Classical guitar technique stroke that a guitarist will use is motivated by personal choice of tone quality, dynamic control and efficiency. The tendency of modern influential classical guitar performers and teachers to promote it often leads to a preference for free-stroke, and thus a discrepancy from earlier trends such as the mid-20th century reliance on rest-stroke. Furthermore, by experimenting with hand positions and nail angles, it is possible to achieve satisfactory volume with the free-stroke which is comparable to that of the rest-stroke: this often requires the use of a smoothly filed fingernail. Again, this is a matter of preference and taste for