There are a few reasons why they wouldn't. Most of these can be found in a lovely Blue Stripe article from Somethingawful, but I'll summarize here:

1) Holodecks require regular maintenance and cleaning. That maintenance is administered by someone you need to look in the eye later.

2) Things you leave in the holodeck, like...effluvia...don't disappear and can screw with the holo emitters.

3) For safety and to aid maintenance personnel, what you do in the holodeck is recorded in the form of an isolated video log. This only shows you and what you're doing in an otherwise empty holodeck. This is usually hilarious.

No, the Roman Empire, who subjugated almost all of the mediterranean region over a millenia ago.

The Romulan system of government consisting of the Praetorite, the Senate, and the Tal Shi'ar fits the similar triumvirate group employed by China and the First Triumvirate of Gaius Julius Caesar, Marcus Licinius Crassus, and Gnaeus Pompeius Magnus. While Romulans, Romans, and Chinese do share commonalities, the Roman Empire would not fit the overall Cold War arc presented in the series.

http://en.memory-alpha.org/wiki/Romulan

"The Romulans were created by writer Paul Schneider and introduced in TOS: "Balance of Terror". He modeled them on the Romans, naming their planets after the mythical founders of Rome, Romulus and Remus. The Romulans next appeared in "The Deadly Years" via recycled footage of the Romulan Bird-of-Prey, before making a physical reappearance in "The Enterprise Incident"."

I prefer the dry heat, but can't help wondering if T'Pol likes it hot and nasty or prefers it cooler. Vulcan appears to be arid like Vegas.

I'm mostly nitpicking at production decisions here, and most of these questions aren't meant to be taken seriously, but:

1) Why is every species except humanity named after their planet (or vice versa)? Romulans come from Romulus. Vulcans come from Vulcan. Andorians come from Andoria (or, occasionally, Andor - w00t inconsistancies!). The Tellarites come from Tellar. Denobulans come from - you guessed it - Denobula! Presumably, the Borg originated on Borgulus Prime or something. As a courtesy to our future alien neighbours, I propose we rename our planet Humania. Or maybe Humania III, for extra clarity.

2) This was sort of mentioned in the doctor McCoy question, but who in their right mind would EVER rely on transporters? I swear, they never work when you need them. How many times did Harry Kim say, "There's some kind of interference, captain! I can't get a lock!"? And always at the most damned inconvenient moment, too. I mean, you have spaceships that can wrap the laws of physics around their little nacelle, and safely fly through rips in the fabric of space-time, but noooo, you'd rather rely on technology less reliable than a 2001 Ford Explorer. Technology that takes you apart piece by piece, no less, and has been responsible for combining different people into one individual, creating evil twins of its users, hurling its victims into alternate dimensions, and inducing psychosis in those already crazy enough to use it.

3) If humans don't use money, how did the crew of DS9 pay for their drinks and holosuite time at Quark's?

4) Considering how many times Starfleet members have gone back in time to our era, why didn't any of them bother to watch Star Trek? They could have avoided a lot of stupid mistakes.

All I'm saying is the only blood curdling scream I ever heard from a Vulcan involved a transporter.

Long ago the word "human" was almost universally defined as "self-righteous space ape". Though this piece of linguistic knowledge has, potentially, far-reaching consequences and could utterly rewrite our understanding of history, it's been decided that letting the Terrans use it so earnestly was too good a time. It's since been kept hidden from Starfleet for generations.

You can thank Big Transporter's high-paid lobbyists for that one.

They hired an intermediary to use the money for them. It's not that humans don't use money, it's that they literally have no idea how to. Last time O'Brien tried to pay for something himself, he ended up with a scratched cornea and dysentery.

Because in their timeline 1993 was the start of, like world war 3. No one ever got around to making it and the temporal police erased all knowledge of the show after the Space Nazi incident.

Actually.... this is a flaw of perception. Those are the names that HUMANS use for those planets. The Romulans call Romulus Rihan.

They could always just start calling humans Earthlings.