Personally, I do not see the advantage of ESXi hosts with LAGs outweighing the increased complexity they might introduce in most practical cases. Take a look at these articles explaining some pros and cons on this debate:
http://wahlnetwork.com/2014/01/13/vsphere-need-lag-bandaids/
http://wahlnetwork.com/2014/02/05/revenge-lag-networks-paradise/
Adding to the previous message, LACP is only supported on distributed vSwitches. The standard vSwitch only supports static etherchannel LAG with source/dest IP hashing.
The dvSwitch LACP implementation in ESXi 5.5 supports a large number of different load balancing modes, see these articles for details:
http://wahlnetwork.com/2014/02/19/exploring-enhanced-lacp-support-vsphere-5-5/
http://wahlnetwork.com/2014/02/19/exploring-enhanced-lacp-support-vsphere-5-5/2/