I've also been experiencing OBs for the first time thanks to a DIY project, and find them to offer all of the things already said here. Dynamic, tight, fast bass, full and satisfying mids, impressive soundstage. If you're interested in a well thought-out DIY approach, check out "ABX Audiophiles" on YT; James has videos outlining the design, and he can get you into the Discord where we discuss the build and link to the design and components.