Warning: This post contains spoilers.

While "Shameless" has been deemed a comedy, this season — which concludes Sunday night — has largely been a dark one. Frank nearly dying and Fiona's free-fall have certainly made for captivating TV, but we almost felt the need to do a (tribal) dance each time guest star Joan Cusack appeared, because we knew we'd finally laugh.

Early in the season, it seemed the writers weren't quite sure what to do with Sheila. Her brain-damaged daughter, Karen, left town (with baby Hymie and her husband, Jody, the recovering sex addict both mom and daughter both romanced), and we watched as she became relegated to Gallagher family housekeeper and babysitter. And while we were glad to see that grimy abode get the 409 treatment — especially Carl's room — we prefer her comic relief, which was in full swing by season's end.

[Related: 'Shameless' Finale Countdown: Fiona's Terrible Season in 5 Photos]

As we close out Season 4, we celebrate some of the things we love about Sheila — and the Emmy-nominated Cusack — other than just the way she says, "Fraaaank," when she shares a scene with William H. Macy:

1. She's a nurturer.

Although no longer homebound with agoraphobia, she's still always cooking, cleaning, and taking care of everyone. This season, it started with the Gallaghers, who can always use the help, but ended with her plan to adopt the five Native American children she met while briefly living on a reservation with boyfriend Roger Running Tree.

That nurturing quality knows no limits; everyone is subject to her generosity. And even though she's endured quite a bit of loss, she remains that giving and generous person. She just has a lot of heart.

2. She's no June Cleaver.

Sheila may love rocking an apron and whipping up Betty Crocker recipes, but she's not a boring housewife. She's no prude in the bedroom, as we saw with Jody and Frank, and speaking of Jody, she did date her daughter's boyfriend! And then there was her whole assisting-with-suicides phase… needless to say, the Beaver's mom, she's not.

[Related: Attention, TV Academy: 'Shameless' Is Not a Comedy — and Here Are 5 Reasons Why]

3. She still believes in love.

Sheila turned to online dating this season with some "assistance" from young Debbie. ("Ask if they're DTF," chirped the boy-crazy tween.) And while things with Roger didn't work out, she married Frank on his deathbed. Well, we think — he may still be hitched to Monica. She's been burned in the romance department after her husband's suicide and Jody dumping her to go back to her daughter, but doesn't give up.

4. She wears some delightfully wacky get-ups.

No further explanation needed.