At higher limits, fewer tables equals longer waits.
Wait Time: Large number of tables means no wait time if you're not picky about limits or game for low limits, wait is always short.
Game Nature: Low-stakes NL is incredibly loose and fun the 1/1 NL in particular is wild and kooky: with buyins restricted to 20-40 and only 1 and 1 blinds, it plays a bit like online microlimit. 2/3 blinds, $5 to go, 100-500 buyin (runs on weekends, and sometimes during week).