Read it again, chap~ I said "better" not first. being first never count for much in my book.
F1, if you wait a bit in the cave you can get back into the Vault. Face it, you are being thrown out into the cold dark cave, it's natural for you to wait a bit to get right back in, right? And once you get back in you get a few nice quest to help you on the starting equipment and shits. After that... zip. Nothing else until you complete the 1st stage of MQ.
F2, once you travel a bit, you get hit with dream sequence, the next one sound worse than the last. It will get you antsy (unless you are a monster, as I said) and you get back to check: Viola~ It's actually worse. very anxious and depress. To the point that later runs, I just dont come back. I know what's been happening. My early game for the GECK is very optimized, no shits for wandering around. The Den-> Modoc -> The Den --> Redding -->VC -->Gecko --> NCR (scouting run)-> V13. Another version is Redding -->New Reno -->NCR (caravan run).
After I get the Geck and a final revisit to homeland did I start to relax a bit and finish New Reno, Broken HIll, V15, NCR...