WordNet (r) 3.0 (2006):

unexceptional
    adj 1: not special in any way; "run-of-the-mill boxing"; "your
           run-of-the-mine college graduate"; "a unexceptional an
           incident as can be found in a lawyer's career" [syn:
           run-of-the-mill, run-of-the-mine, mine run,
           unexceptional]

Moby Thesaurus II by Grady Ward, 1.0:

37 Moby Thesaurus words for "unexceptional":
   acceptable, adequate, all right, average, bourgeois, common,
   commonplace, conventional, garden, garden-variety, general,
   middle-class, natural, naturalistic, naturistic, no great shakes,
   normal, orderly, ordinary, plastic, prosaic, realistic, regular,
   run-of-mine, run-of-the-mill, satisfactory, suburban, sufficient,
   tolerable, typical, uneventful, unexceptionable, unimpeachable,
   unnoteworthy, unremarkable, unspectacular, usual