commitment phobic?

i have been abandoning books lately, which is generally not my style. the first two books i started this year i gave up on (those being seven types of ambiguity and one day in the life of ivan denisovich). and here i am on the verge of running away from the shipping news. why is this? i want to give it more of a chance, but - really - let's be honest. there are a million other books out there to read so i might as well get right to the ones that really captivate me. or at least draw me in occassionally. right?