Funny you brought this up...last night, Mike had his first La Perla (from Christmas) and smoked about 1 1/2 inches of it.
He remarked that he didn't like it and was about to just toss it in the firepit...UGH! I yelled no, no, no, no! Wait, give it a chance because the first 1/4 - 1/3 is not necessarily gonna be like the middle or end of any given cigar. He then decided that he was just gonna cut it in half. He didn't after I asked him to just keep on smoking it...well, he ended up enjoying it after all!
Moral of the story: always give it a chance (well, except for that damned White Rabbit Jim gave me, LOL) and then chalk it up to experience good or bad...