Nigel Pearson suggested a chastening experience as Derby manager left him questioning his methods.
Pearson steered Leicester to Premier League survival in 2014-15 before Claudio Ranieri took over and won the title last season.
The 53-year-old left Derby after a four-month spell following a fallout with owner Mel Morris which means he will wait for the right job before returning to management.
Pearson told BBC 5 Live's Sportsweek programme: 'It depends very much on opportunities.