I have tremendous confidence in Bill Belichick & the NE scouting staff, so when I hear a NE draft pick and say "who???" I do think that I'm just not as informed.
We'd all have to admit, though, there have been some picks that at the time looked pretty nonsensical and turned out to be awful picks. For me the best example was drafting Florida linebacker Jermaine Cunningham. Having watched pretty much all the UF games that year, Carlos Dunlap was quite a stud linebacker. Cunningham was pretty much just another guy. I was like "really? really?" and it was indeed a wasted pick. But, it happens. BB must have seen a role but JC couldn't fill it.
I'd admit too that some picks I thought were a waste or a reach (Harmon, maybe even Slater, since at the time I was pulling for some now-forgotten binky) turned out fine, or even amazing.
Just saying... our draft is in pretty damn good hands. They make mistakes, even some real head-scratchers, but way less than most.