Ian Gillan adding the then-seldom played "Maybe I'm a Leo" (named after Gillan's birth sign) and "When a Blind Man Cries" – the latter becoming a mainstay in the band's setlist ever since. He said that their first album with Morse, "Purpendicular", "was a such important record for Deep Purple that without that [other records] couldn't have been possible." He has remained Purple's lead singer, though the band has found more success touring than with producing records. Gillan pays particular interest to the lyrics in Deep Purple, and considers it his prime composing role within the band. Discussing the importance of lyrics,
David Coverdale part, the problem had been the comparison to Robert Plant who had fronted Led Zeppelin, as vocalist, with Jimmy Page. Some of their audience criticised Coverdale, feeling he was merely a Plant clone; Plant himself referred to the team-up as ‘David Cover-version’. Others felt the short-lived collaboration only served to inspire Page to once again hook up with Plant, a year later. In 1994 Coverdale assembled a new line-up of Whitesnake (with the exception of Coverdale's musical partner, guitarist Adrian Vandenberg and bassist Rudy Sarzo, both of whom had been in Whitesnake since 1987) to tour for the release of