Allow me to present my first route suggestion. connecting Zwolle to Schiphol Airport via Lelystad. The first dutch route released recently, Spoorlijn:Zwolle - Groningen. I enjoy playing it and i thought it would be cool to "connect" it to another part of the Netherlands. this route is 112 km long and has 16 stations. zwolle kampen zuid dronten lelystad centrum almere oostvaarders almere buiten almere parkwijk almere centrum almere muziekwijk almere poort weesp diemen zuid duivendrecht amsterdam rai amsterdam zuid Schiphol Airport various train options on this route: sng, icm, icng, slt this route offers a mix of endless farmlands, big city vistas, cool station designs and awesome bridges (you can't go wrong with awesome bridges). i'll post some pics in the replies.
I'm not sure the section between Zwolle and Almere is the most interesting, but Almere - Amsterdam certainly could be. And it's my local line so would certainly love to see it in the game. Partly overlaps with my own suggestion too.
This is great, but honestly, I personally would prefer Amestardam to Rotterdam or other section on the HSL, with the ICNG and TRAXX E186 + ICR coaches. I want to go at 200km/h on the HSL, and I also love the ATB>ETCS transitions.