...For a ball marker? Ball mark tool? Putter?
For a ball marker, I usually use my Muirfield Village one. However, I have a quarter with my birth year on it that my mother gave to me. Ball mark tool...I use a Scotty Cameron tool (green). I like it because, well, it's a Scotty/Titleist piece, and it doesn't tear up the green(s) like other tools. Putter...I have a Studio Select Newport 2 MS. I LOVE my Scotty, BUT, I have my heart set on a 3X/Tour, black, 009 (hopefully, with no sight line/dot). I also like the Studio Select Newport 2 Tour Black Deep Milled.