A lot of earlier strips involved Darryl coming home from a miserable day at work, only to feel much better when Zoe (then a toddler) would happily greet him at the door.
Darryl: Talk about your fast-acting non-aspirin pain relievers!
One Sunday strip had Wanda (somewhat bitterly) explaining to Zoe that while Darryl goes to work during the day, she stays at home because she thought it was important to stay with Zoe. Zoe's response is to happily say "Ma-ma" and give her a kiss on the cheek; this immediately makes Wanda feel better.
Any strip that shows that despite the various stresses in their lives, Darryl and Wanda do truly love each other and their kids. One strip has Darryl coming home from work and seeing a disheveled Wanda with a fighting Zoe and Hammie. His response is to take the children from her, give her a kiss on the cheek, say "My turn," and walk off.
Wanda: I LOVE YOU, DARRYL MACPHERSON!
This strip where Darryl looks after Zoe when she goes to the bathroom by herself at a diner.
Zoe: DA-AD! I'm not some baby, you know!
Darryl: You're right... You're my baby.
Just about any strip with Darryl and Zoe bonding in some way is very sweet, especially as she gets older.
The "dad school" strip, where Darryl tells Hammie that he's enrolled in "dad school", which is a long, tough program "but it's what I really want to do." He then asks if Hammie wants to help with his homework: playing football.