Can't say I've ever liked any of the user IDEs for DBP, I mean they've all felt to be extremely low quality.
BlueGUI in particular despite what everyone claims has never proven itself to me as worth leavning it's quirks. The standard IDE is pretty much stable, and I've not had a problem with it since Windows XP SP2 was released.
The main reason I dislike the other IDEs is simple though.
They're not simple.
BlueGUI and Codekeeper are very similar, in the fact they're trying to do far too much with bugger-all space. If the UI was to be designed properly, by someone who understood what is easier for everyone then they would probably be a lot better. I've always found that a comfortable working environment produces better work, if you get frustrated by where things are, how it's inlay is done then you tend to stress more and get nothing accomplished.
DarkEdit is pretty sweet, imo. It's effectively a glorified Text Editor, and quite frankly you don't need much mroe.