I dont think i even noticed there are serif fonts (Times New Roman for example) and sans serif fonts (like Arial).
I guess the first thing everybody does as a font-newbie, is download every crazy free font you can find and install it.
Well, at least i did, and as a science fiction fan, i quickly had a huge collection of "space alphabets".
And if you are doing a texteffect, that is probably fine.
After a while i figured out that i never had good looking fonts for the simple stuff. Like plain text layout.
Thats when i began to do some research, and i think it started because Odinbc from Gimpchat suggested a documentary about Helvetica (with the same name).
Its really interesting and once you are hooked, all of a sudden you see Helvetica everywhere

I did some more research and learned about classic fonts. Like Futura, Garamond, Clarendon (the classic western 'Wanted' poster font), or Arial, etc.
A lot of these classic fonts are quite old (Helvetica is from the late fifties and a younger font), or based on typography 100 years ago and older.
The problem with these fonts is that they are very expensive for hobbyists to buy, while most of the free fonts, you can get on site like dafont.com, have limitations.
One of the biggest issues with free fonts is that they come with a limited number of weights. So if you are lucky you get a normal, a bold and an italic style. But very often, there is only one style, or no lowercased, or lack of support for certain languages.
Now luckily, i discovered there is google fonts. A huge compilation of free fonts (or thats how i understand it) in all kind of styles.
Some of the fonts are based on classic fonts. Designed as alternatives.
Roboto for example has similarities to Helvetica and Arial example, and comes with 12 different weights.