Thanks for asking.A part of my interest in Melee stems from a general fascination with games (typically older, from the 1995-2005 era) featuring metagames so highly developed and convoluted that they don't even resemble their source material
Examples include speedruns of Ocarina of Time (featuring manipulations of code such as wrong warping, HESSing, and RBA) and the Super Mario 64 A-button challenge (featuring HOLP, spawning displacement, and more)
I'm a big fan of speedruns and glitch art (both the ironic and genuine) as their unintentional and dynamic nature fascinates me
There is more to the melee scene in my eyes though than an evolved state of the game. There is also a huge amount of personality and uniqueness in the way players approach their characters and the game as a whole. Unlike in speedruns where there is set, optimal way to play, Melee really is much more freeform art than science.
It also is the only "sport" that has really captured my attention outside of a few matches, as I regularly tune in to twitch streams and catch up on YouTube vods even when the matches aren't very noteworthy
In terms of personal investment I'd say that over the past 2 years (ever since watching the Smash Bros Documentary by Samox) I've put in about 200-250 hours of playtime in Melee and well over 800 hours of watching footage/highlights