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любить is imperfective verb so if you say "любил", it means that you loved them somewhen in the past and don't love them anymore.
полюбить is perfective, but if you say "полюбил", you mean that you...

Этих картин*

But you could just be a lot easier on yourself and say 'этот сайт'.[/quote]
Эти картины. For inanimate objects, accusative case differs from nominative only for feminine singular.