Call of Duty
released essentially the same game four years in a row now! not to mention the map packs.
http://en.wikipedia.org/wiki/List_of_Call_of_Duty_games
15 titles in total
Most things 'Nintendo'
Don't get me wrong, I like Nintendo, but I'd like to see some new franchises.
Mario of course is the most milked
http://en.wikipedia.org/wiki/List_of_Mario_video_games_by_year
223 titles!!!!!!
Star Wars
You all know what I mean, that franchise has been milked since before most of us were born!
http://en.wikipedia.org/wiki/List_of_Star_Wars_video_games
92 titles, not including expansions and cellphone games
Guitar Hero/Rock band
Seriously! not only do they have a ridiculous amount of titles, but they make you buy cheap-quality, over-priced controllers costing several hundred dollars
http://en.wikipedia.org/wiki/Guitar_Hero
24 titles
and
http://en.wikipedia.org/wiki/Rock_Band
10 titles
World of Warcraft
Sunk hundreds of dollars into that game myself(initial fee, subscriptions, expansions), got to end game once, enjoyed it, played more end game for a few patches, it just seemed the same to me.... It feels like all dungeons and raids use the same basic formula.
Runescape
No amount of graphical updates will ever make point/click level grinding fun.
Naruto
How many Naruto games are there?
http://en.wikipedia.org/wiki/List_Of_Naruto_Games
37!
that is A LOT, considering the first came out in 2003!