It is awesome. Probably my favorite series now

After KH1 you should play Chain of Memories for the GBA.

BBS is saved best for last from that list, but there were three more games released after that: 358/2 Days, coded and Dream Drop Distance. I guess Days, coded and BBS can be played in any order, though IMO Days works best first and BBS in the middle, but 3D has to go last as it ties in directly to KH3 which is not actually released yet and is set to be released for the the ps4 and xbox one.