I enjoy a good BJ, but I like my wife's hand(s) better for three reasons:
1. We both love to watch me cum. When I explode spectacularly, she squeals and giggles with delight, especially when I squirt all over her or myself. She often likes to do a verbal instant replay. "You suddenly got really hard, I could feel a quivering in the base of your penis, and I knew you were starting to cum. Your first pulse was just a little squirt that only went an inch. Your second pulse was big and hit your chest. I pulled you toward me on your third pulse, and you hit my ..."
2. She can actually cum herself just from giving me a hand job. When I'm getting close, she almost always starts moaning with her own pleasure like she's getting into my head and feeling exactly what I'm feeling. If rub her clit when she's moaning, she almost always cums, usually repeatedly. It's fun to give each other simultaneous hand jobs.
3. When I want to fuck and I can't get her in the mood, she'll sometimes say, "Let me play with you." I love those words. I've never turned her down. When her hands have put me into a state of ecstasy and she's moaning in pleasure along with me, she's usually ready to fuck if I want to, and we usually do. Every now and then she'll get hot that way and want to fuck, but I'll just want to lay back and have her finish the hand job. This sometimes makes her jump on top of me, straddle me with her legs, pull me inside of herself, and hump me like crazy. I don't mind a bit. Those interrupted hand jobs are the best.