They have a "guide me" option that will basically give you a survey about how healthy you are, what your preference for risk tolerance is, etc.

In general, the silver plans are what I'd recommend. If you're young, healthy, and risk tolerant, a bronze or bronze plus plan is a decent option. You'd likely pay a lot in the event of an accident or serious illness, but the odds of those may be very low in your case. Silver aren't prohibitily expensive, but cover much more if you need to use it.

Conversely, you'd have to have really high medical usage to make the gold plans balance out in your favor. My fiance and I both have fairly high medical usage, but had to stop doing gold a couple years ago when they made them hella expensive.

One thing to check before you commit is that the clinics and doctors you want are in network on the plan you choose. The Blue Cross/Blue Shield plan was listed as the cheapest of the silver options for us, but I'm glad I checked because NONE of my doctors (at really big, normal clinics) are covered by it this year.

The vision and dental coverage options are all really inexpensive, so I've always chosen gold plans with those since it's such a small cost increase from silver or below.