I have made about 50 gallons of mead in the last 8 years. I started brewing beer perhaps 12 years ago. I graduated to wine about 8 years ago with the primary intention of trying to make a good mead.
I use only local honey - my supplier sells me unfiltered dregs super cheap. He gets I think $4/lb for table honey, but he'll sell me 20 pounds for $20-40.
I have made good, not-so-good, and fairly poor mead. The worst ones are too sweet - when fermentation is incomplete. Strangely this has happened most often when using liquid yeast starters.
Because the flavor of mead usually is very light, even the slightest off flavor is noticeable, which is why I believe mead is the hardest of beer, wine, and mead to make.
A batch or two ago, I made 4 gallons and decided to flavor 3 out of the 4 gallons with different herbs and spices - also called metheglin. (One correction to an above statement that mead is also called melomel: melomels are meads with a fruit in the recipe - they are not one and the same.) My intent was to use the flavored ones as marinades for game meat. I ended up drinking them
The unflavored gallon was good - a little dry, but dry mead can be good, too.
One was ginger-clove-orange (I used powdered ginger - first mistake) and dried orange peels. It was on the sweet side, but good.
The second was rosemary-lavender. You couldn't detect the rosemary because I used 4 times as much (dried) lavender as I should have. If you have ever heard an alcoholic beverage described as "medicinal," this was it. The lavender was overpowering. However, I like strong flavors and I liked it quite a bit.
The last, I dry-hopped with hops I grow myself. You might think this a strange combination, but it was fantastic. I grow 4 varieties, but at the time only my Cascade were doing well so this is probably what I used. The bitterness of the hops cut the sweetness of the mead very well.
If you're wanting to try making mead, my recommendations are to make two or three batches simultaneously, maybe stick with just 1 gallon each. Make one with 1-2 pounds of honey to the gallon and one with 2 or 3 and one with 4 or 5 pounds. This will give you results at the extreme ends of light and very sweet mead.
Use wild honey - don't use store bought. Wild honey actually has flavor.
Use good water - not hard or too soft.
Use wine or mead yeast. Champagne yeast is probably best because it will impart no flavors of its own and tolerates high alcohol content, which your mead will be especially if you use a lot of sugar and it ferments to completion.
A packet of good yeast will run you $1 or $2. Don't bother with liquid yeasts ($4-$10) unless you're really serious. SPend the extra $0.50 or $1 over bread yeast.
That said, I have made good wine with bread yeast. In fact, the best apple wine I ever made I used bread yeast. I can be done, but your results will be more consistent with wine or mead yeast.
You can make a "small" mead with only 1-1.5 pounds of honey per gallon and ferment it with an ale, wine, or mead yeast, this will be the quickest of fermentations. The others should be fermented for 4-18 months. Make sure you kill the must with campden before bottling or similar else it could referment you can have popped corks and a very sticky mess or at worst burst bottles. I speak from experience!
It's also a good idea to let the mead condition in the bottle for 6-18 months. Mead really does improve with age up to about 6 years.
Good luck.