My 24 y/o gelding sees me as the bringer of food, scritches, and the occasional treat. He's not unfriendly, but I know if I dropped dead tomorrow his only concern would be that someone else take over my duties!
Both the 6 y/o TB and 12 y/o Arabian geldings are all about
affection. They'll vie for my attention, even if they're aware I don't have any food on me.
My heart horse loved me, but was never one for PDAs. He enjoyed a good grooming session, but hated if I hung all over him and smooched his face. He'd tolerate it, but with ears back and a long-suffering look on his face.
Horses have different personalities. As long as your mare behaves well and has a good work ethic, you shouldn't lose any sleep over whether or not she thinks your company is the best thing since sliced bread.