To be honest it may not have been reverb, but that was my best guess for what the hell one 'pro' who charged £75 ($140) a track delivered to me. I honestly could not believe how terrible everything sounded, the vocals were tinny, flat, peaks were a mess and I sounded like Stephen Hawking on the final word in each line... When I mix and master myself, I usually know how I want to sound and have several people in my studio anyway for opinions.
Most of my pro experiences, even with engineers in commercial recording sessions arranged by managers/collab artists, have also been unpleasant. Hip-hop seems to have a seperate style to mixing/mastering and a lot of pros use bad techniques. I generally record, have noise gating and then take the raw wav files home.