So here's a not-so-caricatured-portrait sketch of "Alf Stewart" from Home & Away.
("Alf Stewart" - digital sketch. Original 1000x1300px . © 2010, Andy Dolphin)
Any caricaturists reading this - have a go at Alf and let me know in a comment how you fare.
Created with a Wacom Graphire 4 tablet and Photoshop CS.