In my case, it’s actually a huge excitement factor. Some faces in the VK scene are so prolific with their involvement that they basically become a seal of quality when their name is attached to a project (like say, Sharaku Kobayashi, Kozi, Shuuji Ishii, etc). When I see that a bandoman who has continuously delivered is going to be part of a new band/side-project, I just know that I’m gonna love it. There's also the "brand new dream team" factor of new bands with old names. I remember when Roman Kyuko formed and I as a fan of both Siblebashir and Sex-Android, was wondering what power-house vocalist Izumi and obscure-style-lover Toru would sound like together (they sound amazing, Toru's love of Rockabilly 'n punk + Izumi voice = perfection).
Of course, I get attached to some band members and follow every single one of their side projects/new bands and even their off-stage activities. Some of these guys make the kind of art I want to see in the world and I wanna do everything I can to support that (and them). Plus most of these guys are just interesting people who passionately share their love for art and their personal artistic processes, so it's fun to get to know the people behind the instrument and root for their success because you like them as a person in addition to their musical outputs!
It can also be inversely, where I go backwards and check out some old and/or obscure band one of my favs was in it. From humble high school garage bands to subterranean hidden gems to one-time team-ups, going down the band name rabbit hole is something that I think is, as it is, special to the VK scene.