In general, I have to learn things in a very specific way. Unless I can create a system in my mind, with a place to put what I am learning, I will be unable to acquire the new knowledge.
By far my most effective channel is reading. I can learn even the most complex things by reading about them, and my mind will fill in or "ask itself" for missing pieces of the system. In stark contrast, other visual learning media (such as pictures) are ineffective - I quickly forget what pictures look like (a pronounced visual agnosia that extends to faces).
Auditory learning is challenging for several reasons. First, I have an auditory processing disorder, so if I can discern speech at all, I usually miss bits and have to fill in the blanks while following the ongoing conversation. I then need to "see" the words, and read the virtual image. All the while, I am building the system in my mind to understand and retain the information, mapping what I hear into that system. I can do all of this, but tire easily. My daily limit is about three hours, with breaks, before my mind totally shuts off, after which I am reduced to staring out the window and allow my mind to catch up and organise all of the new stuff. Even in the attentive state, there's no way I can be expected to look at the speaker; more commonly, when listening intently, my eyes are either closed or fixated on a distant object.
Tactile learning for me is only effective when I am learning how to do something requiring motor activity (beyond writing or typing). I am dyspraxic and somewhat apraxic, and need to slowly repeat the actions many times before retaining them. If the order is changed, or if I don't do the activity for a while, I am essentially starting over learning how to do it - frequent reinforcement is necessary.