To each their own, of course. Personally, I think a bat and helmet can look great signed. Batting gloves and often spikes, not so much. Jerseys can be hit or miss, especially over time. I really don't like getting jerseys signed. There's too much that can go wrong that can damage the eye appeal and value. Even if a jersey is signed perfectly, over time the ink can bleed and or fade.

Plus it's hard to trust athletes these days to sign an item well. And many of them have autographs that are just scribbles. Why have someone scribble on a nice game-used jersey?