1) Banal 2) Bleak 3) Boring 4) Dull 5) Inane 6) Nondescript 7) Ordinary 8) Unremarkable 1) Dull and uninteresting 2) Nondescript 3) Ordinary 
• (a.) Destitute of any distinguishing quality; without character or force.
Char'ac·ter·less adjective Destitute of any distinguishing quality; without character or force. 
[adj] - lacking distinct or individual characteristics
nondescript adjective lacking distinct or individual characteristics; dull and uninteresting; `women dressed in nondescript clothes`; `a nondescript novel`