You get your Enchant stats up to 100, capture a Golden Saint soul in that grand gem and...what are you going to enchant???
Here's my *most favorite* item that I have created to date:
Ring of Flying
Levitate 1-15pts
CONSTANT EFFECT
There is no better way to explore the Ashlands (or the ocean) than to fly high above it!...

Also quite funny if you fly above your opponent and rain arrows on him - Watch 'em run yelling 'Spare me!!'
Other favorite items (so far)
Aqua Shirt
Water Breathing
Swift Swim 1-5pts
CONSTANT EFFECT
Swimming has become much more fun!
Glass (Tower) Shield of Night Vision
1-90pts Night Vision for 50ft
CONSTANT EFFECT
Because I hate wandering around dark dungeons with a torch and not a shield in my hand...(Also works great when underwater)
And my favourite enchanted weapon creation to date:
(ebony Long Sword of Pain[/b]
Damage Health 8-55pts
CAST WHEN STRIKES
(Giving a combined possible damage rating of 9-89 pts - better than a Daedric weapon!)
Question for others - I have a Daedric Longbow and I am stuck for ideas as to what enchantment to give it. Anyone have a good idea?