I first played Dark Moon when it released a decade ago, and i remember that i liked it, then had a weird dislike for it as i learned about the creativity of the ghosts in the original. Now, after playing Luigi's Mansion and Dark Moon back to back, i think my final verdict is that i like both games for different reasons. The original gives you a big mansion that can be explored in a few hours, leaving an adventure that can be pretty fun, seeing all of the portrait ghosts, while Dark Moon offers lots of replay value, with the boos, gems, and all of the gold medals. There's a Switch port coming next year that i totally forgot about, so if you'd like to check it out, go right ahead! And check out the original while you're at it c: