The American Conservative Union has long been the premier organization rating members of Congress on how conservative their voting records are. Recently, ACU began rating state legislators on their voting records, and it just released its third ratings of the Michigan state legislature. I will summarize the relevant information here.
ACU rated 12 house votes and 13 senate votes from 2013 and 2014. Ten of the bills are the same for both halves of the legislature. The most common topics for the state house votes were taxes (3 votes), spending (3), and regulation (3). The most common topic for the state senate votes were taxes (4 votes) and spending (4).
ACU Michigan state senate ratings 2013/2014:
100%: Pavlov, Emmons, Moolenaar
92%: Colbeck, Brandenberg, Rocca, Robertson, Proos, Jones, Schuitmaker, Green, Booher
85%: Marleau, Hune, Jansen, Hildenbrand, Meekhof
77%: Pappageorge, Kowall, Caswell, Richardville, Nofs, Kahn, Hansen, Walker, Casperson
31-33%: Hopgood, Andersen, Ananich
15-17%: Young, Johnson, Gregory, Warren, Whitmer
8-9%: Hood, Smith