Casual player looking for an adult, preferably USA-based guild. I've requested invites to a few guilds with no luck, and we all know general/global chat is completely worthless.

You should provide some details about your game play.  Especially if your a strong players to get into a good guild that fit your play level and style.

What hero you own
What are their levels
Each heroes skill level and talent

level of your towers
how often you play
amount of shards you can farm
how much shard are you willing to donate to further guild

your arena rank and how much hb you earn per day
amount of hb you need for upgrade and how much you have saved up

have you done boss battle before.

Nothing wrong with a casual player or a casual guild because that were you will fit in best.  

If no one offers you a position in their guild doesn't mean you can't apply for guilds that you think will be a good fit for you.

I found a home, thanks

Your welcome.