So, which coins should I actually invest in?

[Skinnkavaj]

Litecoin is always a good shot. It is now very cheap.. again
It seems history is repeating it self.

[razen489]

I'm like you always lurking around for new potential coins to invest in.
I use http://www.coingecko.com/ alot to quickly look at overall performance of a coin.. community and developer is what interest me

I use developer score as the first benchmark, strong developer.. i know it can get through some hard fork shit
Community next to determine if there is a strong backing, and good discussion on the direction of the coin

Then i look at the price, market cap, and stuff to find coins that are undervalued..
You dont want to buy at the peak, but you want to buy at the dip.. gives you a chance to make some small gain day trading, or hold for a few weeks or so and get btter gain. Also helps you make more if you plan to hold long term

My favorite coins i think worth a buy now :-
Blackcoin http://www.coingecko.com/coins/blackcoin
Monero http://www.coingecko.com/coins/monero
NXT..
Myriad.

[50cent_rapper]

Do your own research or get scammed.

+1.

Do your own research and master your analytics/investment skills or you get scammed.

[Djentriser]

I see so many complaints about how this altcoin or that altcoin is going to tank that I'd like to hear something positive. Are there any altcoins that actually look promising?

Sure, there are tons of them. I suggest the following coins:

<whatever coins I am holding>

I expect many here have a similar view.

seems legit