Completely agreed on pencil mics. I've had success with so many brands that it's hard to really imagine anything going wrong.
However, unless I need a really, really intimate tone, I almost always run a condenser as room mic. It fills out and if you don't mess with delay... it adds a natural delay.
If you recording space is really small and dead, a thick piece of flooring can do miracles.
Keeping in mind that you're fighting standing waves in any small room, I got an amazingly good sound once in an 8x12 with walls covered in paintings regular old sheetrock ceiling, but a big hunk of solid parquet that had been displaced with renovation.
Back to the delay thing, you can have a lot of fun changing the delay on the room mic and go from thin body tones too big almost wolfy tones.
Last but not least, you can do the David Bowie thing of putting a gate on the room mic so that it only kicks in when you're doing heavy rhythm... So you keep the intimate close effect with the pencils and shift to a big room sound when the room mic opens up.