In my opinion, the second trimester is the best out of the three.  The first is kind of hard because not everyone knows your pregnant, therefore they don't understand why you are so tired and spacy, grumpy, and or hungry.  For me  it is a trimester full of worries and wishing I could feel my baby move so I know everything is allright in there.  The third sorta stinks because now your uncomfortable with an achy back, and I personally tend to get pretty impatient waiting for the day I get to meet the little person bouncing on my bladder and kicking me in the ribs.  I'm usually back to that tired spacy feeling...maybe because I wake up to pee ten times a night!  These are the reasons why I like the second trimester the best.  The "baby bump" still looks cute rather than huge and maybe even covered in stretch marks, I have a little bit more energy and feeling my baby move brings me so much comfort that all is well.  Not that the whole journey isn't exciting and a total miracle, but man the third trimester seems so long!!  I don't know if other Mommies feel this way, but I sure do!!