If I was to put the albums in order of how much I like them it would be:
S/T
Animal attraction
Turborider
Spirit
Invader
Spirit had some brilliant songs on it, but was far less consistant than the two albums before it, and some songs were pure cringe with their lyrics (Metal ass). Turborider though comes pretty close to the first two albums for consistancy, and the synth wave style really freshened up their sound. Invader while not terrible is a distant fifth as it never really clicked with me beyond a couple of songs. Certainly the only album in their catalogue that I rarely play all the way through. That said, their worst album is still better than some bands best album.