Between health problems and bickering, it’s been a rough couple of years for Aerosmith. So who can begrudge Steven Tyler, Joe Perry and drummer Joey Kramer a little R&R in sunny Hawaii? Looking recovered from the nasty fall that forced the band to postpone a show in Paraguay earlier this month, Tyler and his Toxic Twin donned wet suits for some scuba diving on the island paradise this week. The band, which is at work on its first record of new material since 2001’s “Just Push Play,’’ frolicked with family (Tyler’s girlfriend Erin Brady and Perry’s wife Billie are both there) and posed for photos with fans. They kick off a tour of Japan soon. Let’s hope these sweet emotions last.