Beltre never "felt" like a Hall of Famer to me, and I was surprised at his numbers once he retired. They are what they are, so I think there are a few other phenomena to consider that affect my biases.
1. I never really saw him play much regularly. Seriously: He spent the first 11 years of his career playing on the West Coast. From 1998 through 2004, he was a Dodger and I was watching Yankees games in North Jersey, and so I had limited opportunities to see him in the course of my natural viewing. He spent the next five (05-'09) in Seattle, where it was much the same. I'm not staying up to watch 10:30 games in Seattle and seldom was watching when the M's came to the Bronx. In fact, those last two years, I had moved out of the New York DMA and was watching National League baseball. And actually, he spent the rest of his career in the AL, so I wasn't watching him regularly, except for those odd times when his teams played the Phillies in interleague action, and that's limited.
2. In my own experience, players who played during the time I was an adult, and I was approaching 30 when Beltre broke in, lack some of the mystique of the legends I grew up reading about. Eddie Mathews is a no-doubt HoFer to me, and Beltre does not compare unfavorably to him. But in my mind, Mathews - who I never saw play - is a titan. Beltre is a guy who I knew played, but never really took in. I didn't know about him from books or baseball lore.
To a large extent, I can say the same thing about Todd Helton, who is also deserving when I look at him on paper. Joe Mauer was really, really good, too. I wouldn't have voted for him in his first year on the ballot, but he belongs. I just would've made him wait a little bit. First-year entry seems like an endorsement of the idea that his candidacy has no shortcoming when it does - particularly the length of career. That still hurts Mattingly.
Glad Billy Wagner didn't make it, although he almost certainly will next year. I'm not a fan of relievers being in the Hall of Fame, espcailly the latter-day, one-inning guys, and won't apologize for that.