Overall, S2 of Atlantis was really disappointing after the brilliance of S1. There are some gems in there ("Grace Under Pressure" is one of my favorites), but overall there was a definite lapse in quality. S9 of SG1 was on at the same time and that sucked too, so it must have been a general feeling of malaise on the part of the Stargate writing staff. Gladly, S3/S10 have both shown much improvement.