I'm kind of inbetween, why I like the ability to tinker around with things, I feel that for a lot of software like a game or a website, I shouldn't have to know the inner workings of the website in order to use it. It should be noted that what I mean by "customizability" is high customizability by sacrificing reliability, something like Linux for example which, although extremely customizable, if a problem occurs the computer doesn't help you out at all, you're expected to fix it yourself. This is oppose to things like Windows which will attempt (and 90% of the time be successful) at fixing or diagnosing the problem itself. When I purchase a software I expect it to work right out of the package, I don't necessarily want to fiddle around with it to have it working well, I want it to work as soon as I install it. Things like GTA for example, are relatively modifiable in terms of mods and so forth, but the problem with it is that you have to tinker around with it in order to get even the base game working.
Basically, why customizability is fun and all, sometimes I simply don't have time to worry about that stuff, and sometimes I just want software to work as it's supposed to, without me happening to open up the hood to fix it.