If you are trying to decide what whiskey you like, I agree with Great Antibob, don’t do ice. In any form of whiskey a little bit of water is a good idea. A straw full is a good amount. Makers is a fine, if slightly overpriced for the quality, bourbon. But whiskey’s are a big ol’ world and even the little corner of it that is Bourbon has a lot of variety to it.
Try a bit of Makers, try a bit of Jameson (Irish Whiskey, Bushmills is good too) and try a bit of Scotch (start with a blend, Johnny Walker is fine for your purposes. The idea is to find out if you like the style. Single malts are like the same idea but with more flavor).
Ok, you get through that and you know if you like Whiskey.
Interested in tequila? Here quality is more important. If you are drinking it straight look for something that is called Anejo (with a ~ over the N, but I don’t know how to do that here). Try Don Julio or Herradura. Good but won’t break the bank. Bad tequila is awful though, so maybe find yourself a tequila bar where you can get a good margarita if you decide you don’t like tequila straight. Oh, and no water in tequila unless you are mixing it, which is totally legit and grown up. Many a fine cocktail is made with tequila (see the rocks margarita aka the finest mixed drink known to man)
Now how about gin? Gin is good and under appreciated, but there are more varieties of gin than there are of whiskey, and no two really taste the same. That said…a little bit of Beefeater will let you know if you want to continue your potential interest. If you like the bit of bitter and floral notes it has going on, go forth and explore. I like Plymouth, Hendricks, and Bombay. Some people like Tanqueray, it’s not for me. Try it yourself and find out. Almost all well stocked bars will have most of those (Plymouth might be a touch harder to find). Gin should be drunk very cold, over ice, with or without tonic, and with some form of citrus fruit. Gimlets and Martini’s are fantastic too. Good bars will make them well.
That should keep you set for the spring and summer. Post your results in the fall and we can set you up with some Rum drinks and more adventurous cocktails.
I don’t get Vodka personally. The goal is to have a drink that doesn’t taste like anything. That said, Tito’s does that job better than Grey Goose and at half the price. So, just get yourself some Tito’s and either drink it straight with a lime (very cold) or put it in some juice or something. Me, I would rather drink Gin. But find out for yourself. Note that this is the only time I am recommending one and only one brand. Trust me on this one. My wife is a vodka drinker and I have taste tested many of them, Tito’s is the way to go both for smoothness and price.