I am a single-player only player. A fighting game has zero interest unless it has a complex, deep and involved single-player mode (like Soul Calibur used to have). Otherwise it is just me trying to master moves.



Most fighting games take place in single environments. There is no variability in the gameplay apart from who vs. who.



With a beat-em-up I have a definite line of progression in multiple environments. I fight numerous different types of enemies with different abilities and AI, sometimes one-on-one, sometimes in tandem with others.



Fighting games are just so sterile because what they are really trying to appeal to are competitive players. That scene is about as appealing to me as a rave is to a nun.