The Munster back row will win his 68th cap for Declan Kidney's men in Sunday's RBS 6 Nations clash against France and he insists he's not finished yet.
"I'm just as hungry as ever, if not more so," said Wallace, who is out of contract at Munster in the summer.
"I'm working as hard as I can. I hope I've got much longer at this level. I feel like I'm in good shape and the body isn't giving out too much.
"I'm happy to keep playing. I'm happy with my form - my work-rate is as good as it's ever been.
"There are always things you want to tinker with and improve, but I'm happy with where I am at the moment.
"Fortunately no parts of my game have got worse with age. You gain more experience and knowledge and I hope that the curve is upward rather downward."