Would using a Z instead of an S make the domain crap? For example:
SupportForumz.net rather than Supportforums.net
Yes that would be a rather silly thing to do.
It looks immature in my opinion.
yes, it would make the quality less. Because the original would have an S
This will look like you have no creativity in you're own making of domains and therefore a copycat. I would suggest just making another domain up for support forums, like if un-registered "support.us".
I think it works fine in usernames, but a z is a no-no in domain names.
It depends on your audience, if you are audience is an urban teen-based one. Then z would be okay as a replacement but then if the there another domain similar to yours, people can get confused.
If it was something like Eazy.com where the domain is still short, catchy and looks good, then it can work. However if it was like SupportForumz.net then it would just look ridiculous.
My opinion is that having a "Z" instead of an "S" in domains is a huge fail unless your making one of them money making sites like when you click adds.
Like:
Neobux
Onbux
ezcash
ect..
Well yes because charm of origional word is far better than word with z in end. Many people feel cool using zero instead of O, and z instead of S, X instead of Z, but to be honest it looks crap to me.