The "big name" units (32 Bn. Recces, Parabats) are well represented but some of the "National Service" memoirs are interesting, and, on occasion very funny.
Anything written by Col J Breytenbach is pretty good. Not least of all because he is a guy who has "been there, done that, and got all the T-Shirts" (armour, RN-FAA, Suez, Biafra, Fort Benning, SF, Parabat, 32 etc. plus a string of gallantry medals), but also as he has an ironic, whimsical and amusing style of recounting events. Some of his bigger battles were within the system rather than the events in Angola etc.