I find it pretty monotonous, repeating the same thing every day and counting prostrations. I find myself detached from the practice and, yes, one could say I am bored. I don't feel connected. I have reduced the number of prostrations I have been doing, which has helped somewhat, but I still find that I have to push myself to do the practice and am relieved when I am done. I have talked with my teacher, but wanted to get input from fellow practitioners.
That reminds me of something, I think it was Kalu Rinpoche, who completed Ngondro many times who said something like you do 100,000 because then there is a better chance that you might get it right once or twice!! And that reminds me of the "Better than a thousand..." chapter in the Dhammapada. And that reminds me of something that the Korean Zen master Zen master Dae Haeng Sunim. I met her once and asked her about 'gaps' in one's practice. She said it's all practice, the gaps are like the air in the bubbles in boiling water. You can't separate it. She said, 'just throw everything in' . which means your original mind. You just toss it in. Don't worry about being bored, because that is not your true mind.
The Jodo Shin Shu Japanese Pure Land tradition has a very interesting approach to cutting through the feelings one has about one's own practice, which I think is useful, even though technically, it regards any practice that requires one's own effort as essentially useless. Because they refer to enlightenment as "other power", meaning that it comes from Amitabha, they abandon any clinging to the results of one's own efforts
. They just chant the name of Amitabha in gratitude. Chant chant chant chant chant chant chant chant chant chant chant talk about monotonous!!!
Maybe it is the profoundness of monotony which so effectively confronts the ego-clinging mind.
I am not saying that you should do this, but my point is, what if you do Ngondro without any hope of result, without any concern about whether it is boring or not, no expectations and so forth...just do it for the sake of liberating all beings from suffering?
When your mind is clear then you know exactly what to do.