Welcome to the forum, it is a great resource for all! I just reentered the hobby just before I retired in 2011 after a hiatus of many, many years. So I am still playing catch up. I'm sure someone will be along with some suggestions.
Most folks seem to like the steam to diesel era and there are a lot of buildings available from that time period. I also like the more modern buildings and trains (I have all diesels, no steam) and have noticed they are sometimes a bit hard to find in O gauge. I think more modern items are starting to show up here and there, but more are still needed, IMO.
Good luck with your search and if you need any further assistance this is the place for it. I have learned most of what I know from the good folks on this forum.
