The most memorable character I had in that range was a wilderness bandit type, with like seven classes to her name.
Dunno if 'multiclassed amalgam' is an acceptable class answer.
I enjoy psions at all levels, so I suppose they qualify.
It's a fun time to be a cleric. Most of my clerics I've played fall somewhere around there.
Racewise, whisper gnome, strongheart halfling, and dragonwrought kobold I like at these levels for these classes. Also have a fond spot for other subraces of halfling and kobold.
Insert whatever prestige class I'm playing with at the time. That varies a lot.
Ooh gnome illusionist/cleric shadowcraft mage.
I love gnomes and kobolds alike, curiously.