So many extended repair programmes....
A selection of programmes:
late 2007/8 Macbook Pro - *all* had faulty NVidia GPUs (this one wasn't Apple's fault to be fair, NVidia paid for the entire programme).
2011 Macbook Pro - repair programme for distorted/no video
Macbook 2006/7 (Black/White) "crackbook"- plastic top case cracking at the edges. I couldn't count the number of these I replaced, could likely do it with my eyes shut such is the muscle memory. Replacements cracked just as easily too.
White Macbook 2009 - unibody, different plastic, still cracked (around hinges and Ethernet port). More tedious repair due to unibody design.
2010 iMac - Seagate hard drives (again not Apple's fault directly)