How to identify studies that should be replicated?
If I was going to look into replicating a study, I would look for one that satisfies some mixture of these two ideas:


Is there something to gain from the replication? Do I find the original study/results important? Would a replication add to the field? Have I ever wished someone would replicate this?
Is there reason to believe something would be different? Do I think their conclusions are wrong? Or could I generalize the original result by changing something?


For example, there is a paper that I heavily cite in my work but it is getting relatively old (software engineering does change with time, I think!) so I have wished someone would replicate it. It isn't possible for me to replicate it completely but regardless of the result, I think it would help the research community.

Note: This is coming my from perspective in a field that doesn't particularly value replications (unlike medicine and psychology).