Someone said to me the other day that the difference between geldings and mares is that geldings are consistent with their issues - as in they pick their particular issue or foible and it stays the same - and with mares it's a new thing depending on the day, their mood, or the amount of wind in the air.
Now, since I've only owned a mare - and only for a little over a year - I can't confirm this particular observation, but it does fit with what I know about Lena and what I've experienced with the geldings I know.
Now there's no doubt by now that I love this horse - and that I think she's special and wonderful - but she does try and do new and different things most every day, I think mainly to see what she can get away with.
Some people want horses that are even-tempered and obedient and not at all moody. Me? I like to work with her, see what kind of attitude I get today and how I can play with it and get some kind of agreement with her about what we're doing.
Otherwise what's the point?