A quick best of (I'm probably forgetting something):

Save Me
It's Not
Little Bombs
Calling on Mary
This Is How It Goes
Wise Up
Red Vines
Humpty Dumpty
Phoenix
Lost In Space

A 2 Song EP

Voice Carry
Time Stand Still

I Should've Known

Bachelor #2 and I'm With Stupid are the first two to get.

I've always loved the duet with Michael Penn, "Christmastime."

Favorite Aimee Mann song - "Long Shot" from I'm with Stupid
Favorite Aimee Mann album - Bachelor No. 2

And most of my favorite songs of hers would be taken from those two albums. This is not to say that there aren't some really good tracks on her other albums, though.

I'd throw in the last 'Til Tuesday album, "Everything's Different Now". Basically a solo Mann album and quite good.

A difficult task to pick favorites, but these would definitely be on my "Best Of":

You Do
Red Vines
Save Me
Build That wall
Wise Up
Deathly
Driving Sideways
This Is How It Goes

I also liked Magnolia and her cover version of "What the World Needs Now (is Love Sweet Love)". Plus her 'Til Tuesday stuff also.

I love all of her albums. My personal favorite is The Forgotten Arm. Now that the holidays are here, it's time to pull out One More Drifter in the Snow.

"Two of Us" Beatles cover w/ Penn on the "I am Sam" soundtrack

The Magnolia soundtrack is awesome, IMO. I think she has 9 songs on there and they are all really good.

I think it's the best thing she's ever done.

Save Me
The Other Side of the Telescope
Nothing Is Good Enough (with lyrics, from Bachelor #2)
Wise Up
Humpty Dumpty
This is How it Goes
That's Just What You Are
Choice In The Matter
Amateur
Long Shot
Going Through The Motions
That's How I Knew This Story Would Break My Heart

etc, etc, etc.