Yesterday, while doing a checkout with a CFI, I had something I found off happen on the radio. Me - "Chandler Tower, Bugsmasher 12345, holding short, 22R, ready for departure." Tower - "Bugsmasher 12345, cleared for takeoff, 22R, fly straight out" Me - "Cleared for takeoff, 22R, Bugsmasher 12345" Tower - "Bugsmasher 12345, confirm fly straight out instructions" Me - "Cleared for takeoff, 22R, fly straight out, Bugsmasher 12345" Typically I do repeat back specific departure instructions, but I didn't that time. Am I required to do that, or was tower just being picky? It wasn't really that big of a deal. I blew it off, and read the instruction back the way he wanted. However, I do want to make sure I am as precise and correct as possible when flying and talking on the radio.