Here's mine, in case anyone cares:
1 The Far Side (The only comic I've actually bought more than one collection of)
2 Bloom County/Outland/Opus (I consider Bloom County, Outland and Opus to be three iterations of the same strip, so I won't be listing them seperately. But if you want to pick one, go with Bloom County)
3 Doonesbury
4 Calvin and Hobbes
5 Dilbert
6 Close to Home (the spiritual succesor to The Far Side)7 Sally Forth (seriously under-appreciated)
8 For Better or For Worse
9 Pearls Before Swine
10 Non Sequiter
11 Baby Blues
12 Fox Trot
13 Pogo
14 Mother Goose and Grimm15 Rose is Rose
16 Rhymes with Orange (BTW, door hinge)
17 Luann
18 Jump Start
19 Blondie20 Big Nate
21 Penny Arcade22 Curtis
23 Zippy the Pinhead
24 Garfield minus Garfield (sure, why not)25 Gasoline Alley (never read a single one of these, but Rifftrax keeps referencing it. And appatrently it's one of the longest running strips ever.)
My favorite Far Side:

Luposlipaphobia: The fear of being pursued by timber wolves around a kitchen table while wearing socks on a newly waxed floor.