I liked Archer/T'Pol, and Trip/Hoshi.
I certainly would prefer Archer/T'Pol better because their relationship, as portrayed on screen, seemed much deeper. When I watched season 1, it seemed that the writers were playing with the idea of both Archer/T'Pol and Trip/T'Pol, and at the beginning, I thought that both could work (though I had already heard that there would be eventually be some Trip/T'Pol in later seasons, and no, I would not want to see a love triangle). Or rather, that decon scene in the pilot had me rolling my eyes and laughing, and it seemed like a really cheap and obvious way to 'sex up' the show and try to shoehorn some 'sexual tension'. But after Trip and T'Pol went from animosity to friendship, they had some really nice bonding/friendly moments in "Breaking the Ice", when he helped her make a decision to stay on the Enterprise - her first act of defiance against her Vulcan obligations. I thought that this would be the basis for their future relationship.
But then an odd thing happened: the show seemed to completely forget and ignore Trip/T'Pol for the next season and a half, while continuously developing Archer and T'Pol's relationship as friends and co-workers with a lot of subtext... and then in season 3, when you've almost forgotten that there ever was anything between T and T, they start forcing them together - through neuropressure sessions?! As portrayed, their relationship didn't seem very deep, and it didn't help that you always got the impression that T'Pol cared more about Archer and had stronger feelings for him. (as when she was worried for him in "Azati Prime"; and "Twilight" hinted that she was in love with him in the alternate timeline, and was actually prepared to leave everything to take care of him.) There were fewer instances when she showed such care to Trip - there was the scene when she comforted him about his sister, but if TPTB wanted a Trip/T'Pol romance, they should have written more scenes like that, or like the scenes from "Breaking the Ice", scenes that were about their connection rather than just sex or awkward post-coital conversations. T/T could have been great, but it was not written that way.
That said, I did find a few of their scenes very touching - the ending of "Home" and especially the ending of "Terra Prime", which should have been the series finale.
I don't remember any Trip/Hoshi subtext though (except for "Acquisition" when Trip pretends that Hoshi is his wife).