But I don't know what good games are out there. Here are a few I have in mind:
Resident Evil Code: Veronica
Rayman 2: The Great Escape
Crazy Taxi
Marvel vs. Capcom 2
Street Fighter Alpha 3
Sonic Adventure
Power Stone 2
Sonic Adventure 2
Ready 2 Rumble Boxing

Any other suggestions? I'm a real fan of FPS, Action, and Fighting games. I am somewhat okay with RPGs

Since you like fighting games, Soul Calibur is a must

Shenmue has elements of adventure, fighting and RPG, if you like a story I think you'll enjoy it

I also recommend Quake III Arena and 2 good more traditional style of RPG are Skies of Arcadia and Grandia II. Fighting wise Dead or Alive 2 isn't that bad either.

and you'll DEFINETLY want a copy of Soul Calibur.

Thanks for the heads up guys, but i forgot to mention, i also do have an XBox, and I have Soul Calibur 2 and Dead Or Alive 3 (also soon to get Dead Or Alive Ultimate next month)

i just heard a lot of good stuff about the dreamcast, so i purchased one through an E-Bay company (trust me, i verified my references )

i will check out the other games mentioned for sure, but i played shenmue on xbox at one time, and it wasn't the game for me...sorry

but any other suggestions im open to.

The shenmue duo.

Shenmue 1 and Shenmue. They both rock.

Crazy Taxi is really a great game.

Ready To Rumble Round 2 is great, just like the original.

One of my really favorite games is Soul Calibur!

But, if you really really really want to have fun, AND risk getting carsick, try this:

In a vehicle that has a DVD system, take an inverter and plug your DC into this, and us the AV inputs that are commonly in such vehicles. Then, at night, sit in the rear seat and play Crazy Taxi while driving at 50 to 60 MPH on winding country highways. That is a REAL BLAST, but, like I said, it can kinda make you carsick!

i no bags of games that are amzing on dreamcast:
Sonic Adventure 1 & 2
Shenmue 1 & 2 (of course)
Crazy Taxi 2
Sega Bass Fishing is fun if u have a rod (i just bought it)
PSO (Phantasy Star Online)
Wacky Races is quite good.
MegaMan??? Would be good but not sure if it has come out yet??

if u like FPS' house of the dead 2 is one of the best

Soul Reaver you should get, it was good on the PSX but with enhanced graphics it is totally awesome.

Try Spawn; In the demon's hand. I think it's a very fun game maybe that's because it's so easy

Sonic Adventure (2) is nice 2

my fav. games for dreamcast are sonic advenure 1, sonic adventure 2, and sonic shuffle

I highly reccomend ya get marvel vs. Capcom 2, and the Sonic adventure games!!!

If you like a driver sort of game try Super runabout san fransisco edition. Also EGG (electronic gimmick gear) i think that's what its called. PSO is very good. Timestalkers. The sport games. Most games are really good.