Mixes are typically recorded unprepared and unrehearsed, so they can sometimes be a bit rough. My philosophy is that as a DJ, playing "off the cuff" forces you to learn your records, know your music, and expand your skill so you're able to find and cue up the next appropriate track before the current one ends.
Massive Attack - Mezzanine 2xLP
DJ Cam - Underground Vibes
Zero 7 - Simple Things 2xLP
Fantastic Plastic Machine - Luxury 2xLP
(Book on DJing whose title I forget)