Bought Season Two early for two reasons: James Spader, and the writing.
Season One caught me immediately - this show is brilliantly crafted to carry both one story per show through the titular Blacklist, as well as slowly unveiling larger plots threading throughout the show. Most of the supporting actors are extremely good as well. Megan Boone started well but a little "generic" - by the end of season one, she had grown well above the start and her chemistry with Spader is great. Harry Lennix and Alan Alda are fantastic, as usual - and introducing Peter Stormare will make this season so much better. I can't wait!