After listening closely last night
There was someone here who said he uses the same drum pattern, that is correct. On at least 11 or 12 songs he uses the same pattern whether its loud or low pitched in the background its there.
As for why it sounds like one really long song with just the beat switching...there's no pausing between songs.
On a regular r&b album or hell any album really when the song ends there's 2-4 seconds of complete silence indicating the next song is coming on. This album doesn't have that, and it wouldn't be a problem if this was a concept album and he was telling a single story song to song but he's not.