Both Crossing the Bar and Mariana in the Moated Grange (this is the title by which I know the poem) are poems I like very much, too. I like most of Tennyson's poems, but The Lady of Shalott is my favourite. It's a sad love story; the lady falls in love with Sir Lancelot and... well, she dies at the end of the poem. Yet, it is very very sweet in my opinion. Have you heard of Loreena McKennitt? She sings this poem beautifully.
I've read only a few a Keats' poems; I must confess I find him a bit difficult to understand. I haven't read Ode to a Grecian Urn, but I'll look for it and read it soon, then I'll tell you if I like it. Two of the poems I remember having read, and which I enjoyed, are Ode to Psyche and Ode on Melancholy. Also a very short poem called The Human Seasons.
I also like some of Burns' poems, and several of Frost's.
And I LOVE Shakespeare's sonnets. You have no idea how many times I've read them, and I like them more each time.
I also love many of Borges' poems. He's one of the few Argentinian writers I really like.
Miriam