When I bought my FE2 a short time after it was released, I too pondered which 50mm lens to use. It was a toss up between the Nikkor 50mm f/1.8 or the Micro Nikkor 55mm f/2.8. With overall versatility being the criteria, I opted for the Micro Nikkor 55mm f/2.8 which at the time came with an extension ring PK-13 in the version I have. This lens has CRC (Close Range Correction) which in normal language, means the elements float about as you focus closer and closer to your subject. In short, the Micro Nikkor is brilliant with anything close while still reasonably good to great at infinity.
This was my only 50mm lens for years until 1987 when picked up a Nikkor 50mm f/1.8 in Germany. I then had use of two 50mm (ish) lenses and found that I would use the faster 1.8 lens for dark situations where previously I had used the 2.8 lens and got away with it as it isn't that slow. For all other situations I preferred the Micro Nikkor because of the greater versatility of super close range and really unbelievable sharpness when photographing any kind of detail.
For absolute speed I have the 85mm f/1.4 and find that close to my most used lens when using 35mm cameras. I have two F3 bodies as well as my now seldom used FE2.
If I had to choose one standard lens to travel the world, it would be the Micro Nikkor 55mm f/2.8. In general you will not need to have a lens hood as the lens element itself is very deeply recessed, it takes 52mm filters. The only downside is that it is not a small lens compared to the 50mm f/1.8, but I never considered that to be a problem.
On our last major trip to Germany where we spent a couple of months travelling along the northern coast from the Polish border right across the top until we skimmed Denmark, eventually travelling south along the Dutch border, I had a Sigma f/2.8 24mm, Micro Nikkor 55mm f/2.8 and my Nikkor 105mm f/2.5 and a single F3 body. The 24mm is perfect for villages, cities and some nature stuff where you need a wide angle lens, the 55 was perfect for almost everything else with the 105 being used for pulling landscapes and items in and portraiture.
Mick.