It’s very easy to find something you like and stick to it. There’s plenty of people I know who do this, and that’s great. For me though, I feel like I’ve done that a lot in the past, and in doing so, overlooked tons of stuff that’s probably even better. It’s like the whole idea of having a favourite band, or a favourite song: at that point, you’re tying yourself to the concept that no artist or song will ever come along that’ll beat it. As soon as you think that way, you’re gonna miss out, so don’t do it.
If you’re stuck in a rut, the number one tip I would recommend is to set up an account with the awesome last.fm website. Find an artist you like, and press the radio button, and a load of related music that you’ve possibly not heard before will play. As you choose to love or ban each track, it fine tunes it’s recommendations accordingly.
Before using this tool, I just thought the results would be poor; my train of thought being that, even if I like artist X yet hate artist Y, if someone else likes artist X and artist Y, it will recommend artist Y anyway; but I haven’t found that to be the case; it’s clearly a lot more clever than that. If you’re into Logistics, it’s not going to suggest bands like Razorlight, and vice-versa.
I can’t recommend it highly enough. Try it for yourself.