I have found it harder and harder, as an adult, to suspend my disbelief long enough to get through fictional writing such as novels and the like. I can still enjoy a fictional short story, if it is in fact "short", but my mind seems to need details and scientific methodology with logic based arguements to hold my intrest for extended reads. I think when I take time to contemplate what ever it is I have just read, it's more satisfying for me to spend that time in contemplation on something "real", you know "concrete" and potentially useful.
However I really love most all forms of poetry. That does not mean I love all poems. Again, things that hold my attention must be relatively concise and focused. Too much energy spent filling up poems with pretty words and laborious metaphors over and over seem to me, to be trying too hard to be clever and I lose intrest quickly. End of story!