There are lots of games that have gained an unusual level of attention on forums for reasons other than matter to actual game quality or game sales. Often these games lack the factors which seem to be the most directly related to success; and those are being part of a successful series, developed by a team with a track record of success, in a very popular genre, and having strong marketing support from the publisher.
In the case of No More Heroes and Madworld you have new IPs in unconventional or unpopular genres developed by teams who have a history of producing niche games backed by a publisher who makes decisions based on anticipating mediocre sales. While the games are not "Bad" they were unpolished, lacked content, and used an rendering style that few games have been successful with.
Unfortunately, in both cases the games represent a "Seed" of a great game that is undeveloped because they (obviously) didn't have the resources to develop the game further.







