Totally. Totally.
Also, Agent 99, Bailey from WKRP, and when I was a little older, Mallory from Family Ties.
But in those early years, I dreamed about being the filling in a Bailey/Julie Kotter sandwich. Drool, drool.
We’re sure giving away our ages here, aren’t we?
Meredith MacRae played Billie Jo Bradley on Petticoat Junction and drove me nuts. I had an old TV Guide cover with her on it that I kept in my desk in 4th grade.
Pamela Ferdin, once the voice of Lucy Van Pelt and a guest-shot staple on '60s television (she’s a couple of years older than me), now a nurse and animal activist with a criminal record.
I always pick the bad girls. :: sigh ::
Peggy Lipton on “The Mod Squad.” Pure babesville.
Pamelyn Ferdin
From reruns: Bobbie Jo Bradley (Lori Saunders) of Petticoat Junction
From then-current shows: Barbara Cooper (Valerie Bertinelli) of One Day at a Time
The original Becky on Roseanne. She looked like a normal person, except hotter.
Bernadette Stanis from Good Times is STILL fine as hell.
Growing up, I must confess having a thing for pale white women.
Laura Petrie (Mary Tyler Moore) from the Dick Van Dyke Show, of course. I think a lot of guys my age were smitten by her.
And Emma Peel (Diana Rigg) of the Avengers, as noted above. Looked good in a catsuit, was smart, and had that British accent. Yum!
Jo from The Facts of Life
Whatever Valeri Bertinelli’s character’s name was on One Day at a Time
Cha-Chi on Happy Days (after Happy Days, Scott Baio was dead to me)
Sissy from Family Affair
Dare I admit, Mike Seaver from Growing Pains?
Emily Hartley, The Bob Newhart Show
Gage on Emergency!
All grown up Laura on Little House on the Prairie
McGyver (but what lesbian wasn’t?)
Ernie from Sesame street. (yes, the muppet, I was young…What?)
My god I was quite the hormonal child!
Oh, I am so boring and mundane. I loved:
Ricky Schroeder on Silver Spoons
MacKenzie Astin on The facts of life
Michael J. Fox on Family Ties
And, Davy Jones on The Monkees.
I never watched MacGyver, but I would have had a crush on him too.
Cheryl Ladd from when she started on Charlie’s Angels.
Is it wrong that I now lust after her daughter?
Oh yeah, Valeria Bertinelli. One Day at a Time baby.
And of course Pam Dawber from Mork and Mindy.
Emma Peel for sure, (although I’m not sure if those sorts of thoughts really qualify as “crushing.”)
Two proper crushes in the late seventies and early eighties: “Barbara” (Valerie Bertinelli) on One Day at a Time, and “Patty” (Sarah Jessica Parker) on Square Pegs. (Hubba hubba. Hot nerd chicks.)
When I was really little, like around six or seven, I had the hots for TV’s Annie Oakley!
I was still in school in the '70s, so that qualifies me as a kid I think.
So yeah. Pam Dawber and Jan Smithers.
And Jenny Agutter, though she wasn’t a TV character in any shows I watched.
Honey West and Mary Ann Summers.
Batgirl, Yoeman Janice Rand, and of course, Agent 99.
ABC Evening News’ Peter Jennings, who was not a character per se, unless you count “general casting for dashing, debonair foreign correspondent,” which he definitely was back in his London bureau days. He was smokin’, pardon the pun.
And to a lesser degree, Jameson Parker from “Simon & Simon”. (Parker was the uptight blond one, with the classic swimmer’s body, who bore no familial resemblance to his brother, played by Gerald McRaney.)
I rather liked the preppy type! 
Swooning from past fond memories…
Jodie Foster when she would appear on The Courtship of Eddie’s Father
Jo from the Facts of Life
Pamela Sue Martin from Nancy Drew Mysteries
Oh and Debra Winger as Drusilla (Wonder Girl) Wonder Woman’s younger sister
I really had a thing for tomboys
Mrs. Peel has already been mentioned, so I’ll just add my #2 & #3 faves: Barbara Eden, from “I Dream of Jeanie,” and Mary Ann from “Gilligan’s Island.”