I think even the BPM going up then creating a bit of a lull than back up is good practice. Although you want to stay within that general BPM path, you need to look for energy levels. I know very laid back 120 bpm music and I know high energy 115 bpm stuff. So BPM isn’t the only criteria.
The big issues I have with playing in larger blocks, especially if every block is genre-specific, is that while convenient for you, it does not take the audience into account. A lot of mini-playlists gives you the piece of mind that you can play a few songs that match well together (thus taking away some of the “what to play next”-stress) while watching the cloud react and adapting your program accordingly.
As you progress you’ll know you collection well enough and your crowd reading skills will reach a point where it’s easier to go ad lib and drag tracks from your crates that you feel fit best and mix them into and out of any other track without the benefit of having it in a mini-playlist.
Just my two cents.
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