What mods and themes do you like? How would you compare it to other software? How do you feel about it, all in all?
My take is that the newest version isn't so bad. In fact, it's a shame there is so much prejudice against the software, due to a bad release in the past.
Anyway, I haven't used this software as an admin, though. I've only used XenForo as an admin (statement only in regard to paid software).