We can hope, yes. But for conservatives, there have never been many good surprises on that court. Plenty of bad ones, but not many good ones.
Yes, many of the Republican appointees in the past fifty years haven't turned out as expected: Souter, Stevens, Blackmun, Brennan, Harlan, and Warren all stand out.
The nominations of Democratic Presidents, on the other hand, haven't held any major surprises in the past half-century, with the possible exception of Byron White.
Apparently, Roberts rejected the idea of finding precedent in foreign law, and that is very good.
I don't think that any jurist in the mainstream advocates finding precedent in foreign law (with the exception of English common law).
Kennedy's controversial reference to foreign law in Lawrence v. Texas was only to rebut the suggestion in Bowers v. Hardwick that "Decisions of individuals relating to homosexual conduct have been subject to state intervention throughout the history of Western civilization." Kennedy did not find precedent in foreign law; rather, he referred to foreign law to disprove the allegation that homosexual conduct was deemed illegal "throughout the history of Western civilization."
Well, the death penalty case specifically referenced foreign law as precedent, I think, and he has specifically mentioned foreign law elsewhere - basis for a decision or not, it still is a concern.
Ginsburg and Stevens worry me a lot more than Kennedy, actually.