I've never played a BL game, but I've played a few otome games. My main problem with them is that they sacrifice any plot for just romance. A lot of them are also very short and rushed, and female protagonists are often complete saps.
However, when done right, they are very entertaining. Not life-changing masterpieces, but entertaining. RE:Allistair had a pretty well-written protagonist, but I found the rest of the game a bit repetitive. Starry Sky in Spring is the only otome game I've actually 100% completed.