Not really into all these Sim games out now (Goat Simulator FFS?), but I do enjoy this one. It reminds me of an ancient text-based shareware game called Big Rigs I used to play off a floppy on my 286 PC in the late 1980's.
Work as a truck driver earning money to buy your own truck and build up your own Trucking business. Driving is relaxing, you are not racing but it still is an addictive game driving through that interesting European scenery and visiting all those famous cities. A huge open world to explore. Graphics are good enough to be immersive, just not cutting edge.

There is (like the olden days shareware) a free demo available which is actually a good part of the game, but at US$6.25 for just the next 3 days (75% off) I suggest you grab the full version for the price of a coffee and a muffin.

Only a 633MB download too.

http://www.gamersgate.com/DD-EUROTS2/euro-truck-simulator-2