I have to admit, I like hills, and I just love the feeling of accomplishment and the feeling of working my body when I go up a good hill. But then again I am terrified of going down hill, which is not good as it is hard to find an uphill where there isn't a downhill. For going up a tough hill the bike guru here suggested holding the top of the handlebars and then just try and be upright and concentrate on pulling up on the pedals and in that way using different muscles to help you up. I definitely find the thought of dancing on the pedals helpful when I have to stand up.
Best
Asa G.