The official website does a good run down on his drafting history. It appears the Packers believe he goes for the best available player.
"Although Thompson prefers to shift the spotlight in another direction, his fingerprints were also all over the Seahawks’ road to Super Bowl XL during the 2005 season. NFL MVP Shaun Alexander, Thompson’s first draft pick in Seattle, in 2000, captured the 2005 league rushing title and established a then-single-season NFL record with 28 touchdowns. Nine of Seattle’s Super Bowl starters, as well as K Josh Brown, were drafted by Thompson. That list included G Steve Hutchinson, a Pro Bowler in seven of his 12 NFL seasons.
Seattle could’ve gone in another direction in the 2000 draft. With perennial 1,000-yard rusher Ricky Watters on the roster, the club didn’t need a running back in the first round. But with the Seahawks on the clock holding the 19th overall choice, Alexander was the best player available. One year later, in the 2001 draft, Thompson wanted Hutchinson in a similar situation."
http://www.packers.com/team/staff/ted-thompson/7d1caee3-e8f2-4e20-b304-98064f608dbb