I, as you know, have two mini donkeys. I have very little experience with horses, mini or otherwise, and that is why I hesitated to reply at first. I read booksabout donkeys before getting them. Yes they helped, but only to a certain extent. I find the donkeys to be very complex animals -- in a good way. I will give you my two cents in hopes that something I say will help you. They are not to be taken lightly, these creatures. You definitely get out what you put in. I found that the best thing I could do is observe them and try not to have too many preconceived ideas about how they are supposed to behave. Mine are very affectionate, but are just as likely to bite you in the butt when your back is turned. They act like toddlers in that way. They see what they can get away with. They are always coming up with new antics the reasons for which I am often at a loss to figure out. Today, for instance, I approached them to put on their halters and leads to bring them out for some grass (a routine thing) and they would not come anywhere near me!! I tried repeatedly over an hour and no luck. This was highly unusual and left me baffled and a little hurt. Then I realized that I had a pair of green gloves hanging out of my back pocket (gardening). They wouldn't come near me until I removed the gloves and let them explore them to their satisfaction. They have the reputation of being stubborn, and they are. But often times, they try one's patience because they are EXTREMELY cautious. Patience usually wins, but sometimes it doesn't and I just give up to try another day.
As far as loving, without hesitation I can say that they are very loving animals. An example: one day when I needed to get away from hubby and kids - had had a bad day and just needed to be alone and cry. I went out to the barn to be alone and sat on a bale of hay with my head in my hands. Well, each of my girls came to me and took turns putting their heads over mine and just standing still like that for sevreal minutes until I had calmed down. Now, if that isn't love, I don't know what is!!
Just my 2 cents, hope it was helpful. Good luck with your quest; they are wonderful animals, and you'll never be bored!