Now that's a thought I didn't have. Kids. However, my friend isn't that much into roleplaying, so I'm foreseeing a 60 year old bachelor who still has the mental age of .. um whatever the mental age is for characters who rejoice in vanquishing their enemies in the most spectacular way.
The worst case scenario here is an dirty old man type of adventurer, and I'm not sure I'm ready for that. Can you picture Gandalf laughing maniacally while fireballing his enemies into kingdom come, then high-five his comrades and asking "who's your daddy", flirting with bar wenches one third their age (probably using charm person spells, to boot) and being obsessed with loot?