Slim Thug calls Boss of All Bosses a return to his roots. The shoe fits for an independent release that differs sonically from his 2005 major-label debut and failed-shot-at-the-title Already Platinum. Partly produced by the Neptunes, that work de-emphasized his Houston drawl and DJ Screw-inspired, syrupy beats — both of which are back on his latest, which also recalls G-funk in its smooth-as-glass production and breezy, sung choruses. While the album’s would-be summer anthem, “Top Drop,” doesn’t feel as immediate as “Still Tippin” — his 2005 hit collaboration with Mike Jones and Paul Wall — inspired tracks like “I’m Back” and “Hard” more than make up for it. Boss of All Bosses contains more than its share of thoughtfully crafted, easy-going tracks. Though the subject matter (being tough, hitting on women, and surviving on the streets) is nothing you haven’t heard before, the album still feels as comfortable as a shady, early-summer Texas day. 4 out of 5 stars.