I was looking for Citi Visa AA, but don't see it available anymore.

So far I've signed up and acquired bonuses for:
Amex SPG
Citi AA MC
Chase Sapphire/Freedom/Ink Plus/Ink Bold, United Explorer

Are there any other award CC worth signing up for?

Edit: My plan for now, fine? Should I cut it off at 4 or 5 for a round? Also not sure which one to get for last two. I don't know if I'll use club carlson.

I like airline miles on United the most, I guess AA second (haven't used them much) Never used hotel stuff. Don't want to stomach too much in fees.

Was looking at:
1. SPG Personal
2. Citi Executive AA Advantage
3. Barclays Arrival
4 & 5 BA Chase Card (worth it?), some hilton/marriot card? need help on last part.

Also, going to be opening up new LLC, am I allowed to use the SPG Biz again for new card?