For me.

Northern coniferous forests which includes Pacific northwest forests.
I have spent almost all my life in this environment and feel completely at home in it and have the skill sets to survive. Lost of wildlife, shelter and plants to ensure a good chance of survival.

Grasslands/ semi arid desert.
North of here, there is large region of this type of environment. It is on the leeward side of the coast mountains and so receives little rain and enjoys hot arid temperatures during the summer and depending on altitude, very little cold and snow during the winter. As this environment is much the same as the high desert areas of the USA, in many ways it is also different and supports a large variety of wildlife and habitat. Also water is not all that scarce and many areas have year round supply of it.

Pacific coast shore
If I had to pick one environment to survive, it would be the Pacific coast. Here we have world renown and year round salmon stocks, tens of various other fish species, several crab and clam species, kelp, seaweed and other shore vegetation along with waterfowl, small and large game. Here I can take a small aluminum boat out into the ocean bay and with very minimal gear and time, have enough food to eat every day to survive indefinitely. The weather can be wet during the winter months but survivable with the right shelter.