I'm playing a bard now in an accelerated campaign (we level at the end of every session), and have made the following observations:
-
Combat is unnecessary. I got 10 masterwork crossbow bolts at 3rd level. It's six sessions later, and I haven't fired one yet. I have never had a round of combat in which an attack was my best option. (This may be due to the fact that I'm a tiny character with a 6 strength, but still...

)
-
Everyone loves a buffer. Starting the fight with the song (usually a comic song about the ease with which we'll overcome our enemies) gets me on everyone's good side. Our party has four folks who specialize in attacks, so that's a lot of added damage. And this session I get the "Inspire Heroics" (or whatever) ability: the barbarians gonna luvvvv me.
-
You need Spell Focus: Enchantments. I thought I could get away without this, but it's a must-have for bards, almost as necessary as Natural Spell is for druids. Bards get enchantment spells earlier than sorcerers, and their primary stat maeks them better at many enchantments (especially the Charm line) than wizards. Diplomacy as a class skill is very, very nice, as is bluff: far easier to make your Suggestion sound reasonable if you succeed on a bluff check.
-
Bardic Music is very flexible. Once you reach a high enough level, you'll almost never use up all your bardic music. Which can lead to dramatic rare uses of abilities. I've only used Countersong once--but it was at a state dinner where a powerful evil wizard cast Mass Suggestion, threatening the city's top leaders with assassination by affected nobles. Being able to interrupt and thwart the wizard's speech with a Countersong was immensely satisfying.
I'm having a lot of fun playing a bard. It's very different from playing a druid or a fighter, but it's tremendous fun.
Daniel