I see the lists for years 2002, 2003, 2004 and 2005 but not anything after that. May be there are too many to call favorites?

Apart from that, favorite Perl modules are traditionally showcased in Perl Advent calendars:

• Perl advent calendar 2014
• Perl Advent Calendar 2013
• Perl Advent Calendars 2012
• Perl Advent Calendar
• Perl Advent Calendars 2009
• Perl Advent Calendar 2008
• Perl Advent '07
• 2005 Perl Advent Calendar
• Perl Advent Calendar
• Perl Advent Calendar 2003
• Perl advent calendar
• Perl Advent Calendar Returns
• Advent calendar

See also:

• Announcing the Phalanx project
• Help update the Phalanx 100
• Updated Phalanx 100 stats
• The New Phalanx 100
• Phalanx Phoenix: Mentored Maintenance of CPAN Modules

• Perl Monks Module Reviews section
• PrePAN - Social Reviewing Site for Perl Modules
• Most fascinating but *not really* useful modules
• CPAN module reviews by Neil Bowers
• CPAN Top 100 by Alias

The monk who posted those lists/questions has not logged into the Monastery for some time (approximately 2 years, according to his homenode). As to the reasoning for not having similar posts between 2005 and now (2015), I would not know.

Perhaps this could be an opportunity for you (or another industrious monk) to post the question and solicit suggested favorite modules and the reasoning why those instead of others (if available).

(I will suggest that the type of work and environment a particular monk exists in may affect their choice of favorite modules. Although the reasoning as to why a particular module would be the more interesting portion to me, it also seems as if it might provide an opportunity to learn about modules one is aware of, perhaps introducing one to a new soon-to-be favorite.)

Hope that helps.