I did a lot of West Coast (127.275) in my years at Scottish Centre and I found that a lot of local pilots listened but did not want or need FIS.
With the advent of Mode S, I could click a mouse and see their callsign and on several occasions I called them to see if they were listening as knowing their intentions made my life so much easier regarding provision of Traffic or Deconfliction service to other traffic, once you small guys are "known traffic" life became so much easier.
As for the Class E Airways and unknown traffic, I'll leave that to those still in the job.
You certainly did the correct thing in calling, it made everyone's life easier, keep your transponder on and if you have altitude encoding, use it.