For many years, the Pilot g5 was my goto. With kids, I can't keep a pen around, so we buy the Zebra z-grips in bulk at Costco. But, we also buy Sharpies in bulk. They don't last that long, but mark "forever".Three. And. A. Half. Years later and I'm the first person to vote for Sharpie pens? Have you guys even tried Sharpie pens? They are amazing.
I used to be a Pilot G2 gel pen person, but ran into too many of them that just left glops of ink on pages. Now it's Sharpie pens (and all their colors, holy cow!) all the way.