Oscar Peterson was one of the greatest piano players of all time. A pianist with phenomenal technique on the level of his idol, Art Tatum, Peterson's speed, dexterity, and ability to swing at any tempo were amazing. Very effective in small groups, jam sessions, and in accompanying singers, O.P. was at his absolute best when performing unaccompanied solos. His original style did not fall into any specific idiom. Like Erroll Garner and George Shearing, Peterson's distinctive playing formed during the mid- to late '40s and fell somewhere between swing and bop. Peterson was criticized through the years because he used so many notes, didn't evolve much since the 1950s, and recorded a remarkable number of albums. Perhaps it is because critics ran out of favorable adjectives to use early in his career; certainly it can be said that Peterson played 100 notes when other pianists might have used ten, but all 100 usually fit, and there is nothing wrong with showing off technique when it serves the music. As with Johnny Hodges and Thelonious Monk, to name two, Peterson spent his career growing within his style rather than making any major changes once his approach was set, certainly an acceptable way to handle one's career. Because he was Norman Granz's favorite pianist (along with Tatum) and the producer tended to record some of his artists excessively, Peterson made an incredible number of albums. Not all are essential, and a few are routine, but the great majority are quite excellent, and there are dozens of classics.