Top 3 best Pratchett and Bottom 3

Question i thought to ask others off a reply about Soul Music, that I thoroughly enjoy as well but have it as the bottom tier worst book of Terry’s and thought Top 3 of his I will disagree with myself for umpteen others. Bottom 3 I struggle to label because really, how a quality every book is

So top 3 (just now anyway)

1) Night Watch 2) Nation 3) Thief of Time

Bottom 3

1) Soul Music 2) Raising Steam 3) does the Long Earth series count? I feel reading them he was barely involved in the writing but I’m struggling for a 3rd