Favourite steaks: either ribeye or beef tenderloin (filet mignon).
Tips:
The beef tenderloin can be very pricey...however, I was looking around at Safeway one evening at their beef tenderloin steaks and the butcher came out and started whispering to me. Said that if I bought the whole piece (a giant beef tenderloin) that he'd cut it up for me and that it would be 50% less than buying the pre-sliced steaks.
I also buy the boneless ribeyes when they're on sale.
As for cooking - it's either BBQ them or broil them in the oven. For the BBQ, cook steaks that are 1" thick about 5 minutes per side...add a few more minutes depending on how thick the steaks are. To broil them in the oven - line a cookie sheet with foil, place a rack on top of the cookie sheet (like a cookie cooling rack) and turn up the oven to 'broil'. Cook about 5-7 minutes per side, and leave the oven door open just a wee bit like you normally would whenever you broil something.
As for seasonings, I'm a big fan of Montreal Steak Spice, but have noticed that some of them contain trans fats (hydrogenated something or other in there). Recently found a version at WalMart Supercenter - called, "Durkee Grill Creations Kansas City Style Steak Seasoning" that contains no trans fats - just the spices. An important part of the process is to put the seasoning on AFTER the steaks are cooked. Sometimes salty things can dry out the steaks if they're used while cooking. Just sprinkle on a tiny bit of the steak spice as you're getting ready to transfer them to a serving platter or your dinner plates.
Meanwhile, (while the steaks are cooking) get a giant, deep-sided frying pan out. Melt some butter...add in a bunch of sliced fresh mushrooms. Sprinkle with garlic powder or chopped real garlic from a jar, or if you have the time/patience, some garlic you've minced yourself. When the mushrooms are almost done, sprinkle on some Lawry's Seasoned Salt for added zing. Everyone always asks me, "What'd you put in these mushrooms?" and they're always surprised that it's just butter, garlic and seasoned salt.
Serve with caesar salad or roasted asparagus (but that's a whole other thread). If you wanna get fancy, put some crumbled blue cheese on top of your steak at the dining table.
Enjoy...