<3 dominion! Poppy is super fun to play - I start with Sheen and slam my way to fed status much more easily than on Summoner's Rift. In my experience this mode favors melee fighters (especially Jax, Xin, Poppy, Tryn, Udyr) while most other champions (tank, ranged, support) are gimped unless they can backdoor (Shaco, Eve) or lay traps (Heim, Teemo, Shaco). On Udyr I like many of the new attackspeed+proc items such as the chain-lightning and the on-hit reveal (suck it Akali!).
Overall it reminds me of the glory days of Footy Wars back in WC3, when you could get away with just running around killing people. Obviously there has to be some teamwork in capturing points, but:
-5point map forces teams to spread out
-revealed paths make it less risky to solo
-constant $+XP make farming unnecessary (it is almost always better to capture a point than to fight the minions who spawn there)
-Storm Shield buff is SUPER DOPE on the melee fighters who already dominate Dominion, letting them do as they please.
I agree that 3/2 hold is a good plan. Too many times my team has pushed to the far points only to die in front of their nexus.