I think we better off with common shares
I advise caution with Common shares. There's still too much uncertainty with how the companies will raise adequate capital (earnings dilution, etc) and also the future earnings streams will be significantly impacted if G-Fees are lowered (which I believe they will be). The Preferred holders are the ones fighting all the legal battles.
Keep in mind, the Preferreds were the only "winners" from the Perry appeal ruling. All 3 Appeals Judges stated that plaintiffs may move forward with their Breach of Contract and Breach of Implied Covenant claims, which are specific to Preferred shares.
I do think the Commons will do exceptionally well over the long term, likely 3+ years from now they could be trading over $20.